JEE Main & Advanced Physics Photo Electric Effect, X- Rays & Matter Waves Question Bank

done Assertion and Reason Total Questions - 30

• question_answer1)
  Assertion             :       The energy and momentum (p) of a photon are related by \[p=E/c\]. Reason                 :       The photon behaves like a particle. [AIIMS 2005]
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer2)
  Assertion             :       Photoelectric effect demonstrates the wave nature of light. Reason                 :   The number of photoelectrons is proportional to the frequency of light.[AIIMS 2004]
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer3)
  Assertion             :       When the speed of an electron increases its specific charge decreases. Reason                 :   Specific charge is the ratio of the charge to mass.          [AIIMS 2001]
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer4)
  Assertion             :       X-ray travel with the speed of light. Reason                 :       X-rays are electromagnetic rays. [AIIMS 2001]
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer5)
  Assertion             :       Mass of moving photon varies inversely as the wavelength. Reason                 :       Energy of the particle \[=\text{ Mass }\times \text{ (Speed of light}{{\text{)}}^{\text{2}}}\] [AIIMS 2000]
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer6)
  Assertion             :       Kinetic energy of photo electrons emitted by a photosensitive surface depends upon the intensity of incident photon. Reason                 :   The ejection of electrons from metallic surface is possible with frequency of incident photon below the threshold frequency. [AIIMS 1999]
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer7)
  Assertion             :       Separation of isotope is possible because of the difference in electron numbers of isotope. Reason                 :   Isotope of an element can be separated by using a mass spectrometer. [AIIMS 1999]
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer8)
  Assertion             :       The specific charge of positive rays is not constant. Reason                 :       The mass of ions varies with speed. [AIIMS 1999]
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer9)
  Assertion             :       Photosensitivity of a metal is high if its work function is small. Reason                 :   Work function \[=h{{f}_{0}}\] where \[{{f}_{0}}\] is the threshold frequency. [AIIMS 1997]
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer10)
  Assertion             :       The de-Broglie wavelength of a molecule varies inversely as the square root of temperature. Reason                 :       The root mean square velocity of the molecule depends on the temperature. [AIIMS 1997]
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer11)
  Assertion             :       An electron is not deflected on passing through certain region of space. This observation confirms that there is no magnetic field in that region. Reason                 :       The deflection of electron depends on angle between velocity of electron and direction of magnetic field.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer12)
  Assertion             :       Electric conduction in gases is possible at normal pressure. Reason                 :       The electric conduction in gases depends only upon the potential difference between the electrodes.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer13)
  Assertion             :       Light is produced in gases in the process of electric discharge through them at high pressure. Reason                 :       At high pressure electrons of gaseous atoms collide and reach and excited state.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer14)
  Assertion             :       If different gases are filled turn by turn at the same pressure in the discharge tube the discharge in them takes place at the same potential. Reason                 :       The discharge depends only on the pressure of discharge tube and not on the ionisation potential of gas.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer15)
  Assertion             :       An electric field is preferred in comparison to magnetic field for detecting the electron beam in a television picture tube. Reason                 :       Electric field require low voltage.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer16)
  Assertion             :       The specific charge for positive rays is a characteristic constant. Reason                 :       The specific charge depends on charge and mass of positive ions present in positive rays.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer17)
  Assertion             :       In Millikan's experiment for the determination of charge on an electron, oil drops of any size can be used.             Reason     :       Millikan's experiment determine the charge on electron, by simply measuring the terminal velocity.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer18)
  Assertion             :       In the process of photoelectric emission, all the emitted photoelectrons have the same kinetic energy. Reason                 :       The photon transfers its whole energy to the electron of the atom in photoelectric effect.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer19)
  Assertion             :       In photoelectric effect, on increasing the intensity of light, both the number of electrons emitted and kinetic energy of each of them get increased but photoelectric current remains unchanged. Reason                 :       The photoelectric current depends only on wavelength of light.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer20)
  Assertion             :       Though light of a single frequency (monochromatic) is incident on a metal, the energies of emitted photoelectrons are different.             Reason     :       The energy of electrons emitted from inside the metal surface is lost in collision with the other atoms in the metal.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer21)
  Assertion             :       The threshold frequency of photoelectric effect supports the particle nature of sunlight. Reason                 :       If frequency of incident light is less than the threshold frequency, electrons are not emitted from metal surface.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer22)
  Assertion             :       In photoemissive cell inert gas is used. Reason                 :       Inert gas in the photoemissive cell gives greater current.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer23)
  Assertion             :       X-rays cannot be diffracted by means of grating. Reason                 :       X-rays does not obey Bragg's law.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer24)
  Assertion             :       X-rays can penetrate through the flesh but not through the bones. Reason                 :       The penetrating power of X-rays depends on voltage.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer25)
  Assertion             :       Intensity of X-rays can be controlled by adjusting the filament current and voltage. Reason                 :       The intensity of X-rays does not depend on number of X-ray photons emitted per second from the target.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer26)
  Assertion             :       Anode of Coolidge tube gets heated up at time of emission of X-rays.             Reason     :       The anode of Coolidge tube is made of a material of high melting point.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer27)
  Assertion             :       Penetrating power of X-rays increases with the increasing the wavelength. Reason                 :       The penetrating power of X-rays increases with the frequency of X-rays.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer28)
  Assertion             :       X-rays are used for studying the structure of crystals. Reason                 :       The distance between the atoms of crystals is of the order of wavelength of X-rays.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer29)
  Assertion             :       The phenomenon of ­X-ray production is basically inverse of photoelectric effect.     Reason                 :       X-rays are electromagnetic waves.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow

• question_answer30)
  Assertion             :       Soft and hard X-rays differ in frequency as well as velocity. Reason                 :       The penetrating power of hard X-rays is more than the penetrating power of soft X-rays.
  A)
              If both assertion and reason are true and the reason is the correct explanation of the assertion. done clear
  B)
              If both assertion and reason are true but reason is not the correct explanation of the assertion. done clear
  C)
              If assertion is true but reason is false. done clear
  D)
              If the assertion and reason both are false. done clear
  E)
              If assertion is false but reason is true. done clear
  View Solution play_arrow