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

done Graphical Questions Total Questions - 38

• question_answer1)
  The curve drawn between velocity and frequency of photon in vacuum will be a                                               [MP PET 2000]
  A)
             Straight line parallel to frequency axis done clear
  B)
             Straight line parallel to velocity axis done clear
  C)
             Straight line passing through origin and making an angle of 45o with frequency axis done clear
  D)
             Hyperbola done clear
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• question_answer2)
  Which of the following figure represents the variation of particle momentum and the associated de-Broglie wavelength                                                                     [AIIMS 1982]
  A)
                                            done clear
  B)
                                   done clear
  C)
                                         done clear
  D)
  done clear
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• question_answer3)
  The figure shows the variation of photocurrent with anode potential for a photo-sensitive surface for three different radiations. Let \[{{I}_{a}},\ {{I}_{b}}\]and \[{{I}_{c}}\] be the intensities and \[{{f}_{a}},\ {{f}_{b}}\] and \[{{f}_{c}}\] be the frequencies for the curves a, b and c respectively [IIT-JEE (Screening) 2004]
  A)
             \[{{f}_{a}}={{f}_{b}}\] and \[{{l}_{a}}\ne {{l}_{b}}\] done clear
  B)
             \[{{f}_{a}}={{f}_{c}}\] and \[{{l}_{a}}={{l}_{c}}\] done clear
  C)
             \[{{f}_{a}}={{f}_{b}}\] and \[{{l}_{a}}={{l}_{b}}\] done clear
  D)
             \[{{f}_{a}}={{f}_{b}}\] and \[{{l}_{a}}={{l}_{b}}\] done clear
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• question_answer4)
  According to Einstein's photoelectric equation, the graph between the kinetic energy of photoelectrons ejected and the frequency of incident radiation is     [MP PMT 1994; CBSE PMT 1996; CBSE PMT 2004]
  A)
                                    done clear
  B)
                            done clear
  C)
                                    done clear
  D)
  done clear
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• question_answer5)
  For the photoelectric effect, the maximum kinetic energy \[{{E}_{k}}\] of the emitted photoelectrons is plotted against the frequency n of the incident photons as shown in the figure. The slope of the curve gives [CPMT 1987; MP PET 2001; DPMT 2002]
  A)
             Charge of the electron     done clear
  B)
             Work function of the metal done clear
  C)
             Planck's constant                done clear
  D)
             Ratio of the Planck?s constant to electronic charge done clear
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• question_answer6)
  The stopping potential V for photoelectric emission from a metal surface is plotted along Y-axis and frequency n of incident light along X-axis. A straight line is obtained as shown. Planck's constant is given by         [CPMT 1987; Similar to MP PMT 2000; Kerala PET 2001]
  A)
             Slope of the line done clear
  B)
             Product of slope on the line and charge on the electron done clear
  C)
             Product of intercept along Y-axis and mass of the electron done clear
  D)
             Product of Slope and mass of electron done clear
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• question_answer7)
  In an experiment on photoelectric effect the frequency f of the incident light is plotted against the stopping potential \[{{V}_{0}}\]. The work function of the photoelectric surface is given by (e is electronic charge)  [CPMT 1987]
  A)
             OB \[\times \]e in eV done clear
  B)
             OB in volt done clear
  C)
             OA in eV done clear
  D)
             The slope of the line AB done clear
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• question_answer8)
    The stopping potential as a function of the frequency of the incident radiation is plotted for two different photoelectric surfaces A and B. The graphs show that work function of A is                                                      [DPMT 1992]
  A)
             Greater than that of B      done clear
  B)
             Smaller than that of B done clear
  C)
             Equal to that of B                done clear
  D)
             No inference can be drawn about their work functions from the given graphs done clear
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• question_answer9)
  The intensity of X-rays from a Coolidge tube is plotted against wavelength as shown in the figure. The minimum wavelength found is \[{{\lambda }_{c}}\] and the wavelength of the \[{{K}_{\alpha }}\]line is \[{{\lambda }_{k}}\]. As the accelerating voltage is increased  [IIT-JEE (Screening) 2001]
  A)
             \[({{\lambda }_{K}}-{{\lambda }_{C}})\]increases     done clear
  B)
             \[({{\lambda }_{K}}-{{\lambda }_{C}})\,\]decreases done clear
  C)
             \[{{\lambda }_{K}}\] increases                                          done clear
  D)
             \[{{\lambda }_{K}}\] decreases done clear
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• question_answer10)
  The figure represents the observed intensity of X-rays emitted by an X-ray tube as a function of wavelength. The sharp peaks A and B denote                              [CBSE PMT 1995]
  A)
             Band spectrum                    done clear
  B)
             Continuous spectrum done clear
  C)
             Characteristic radiations   done clear
  D)
             White radiations done clear
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• question_answer11)
  The graph between intensity of light falling on a metallic plate (I) with the current (i) generated is            [DCE 2001]
  A)
                               done clear
  B)
             done clear
  C)
                                       done clear
  D)
  done clear
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• question_answer12)
             For a photoelectric cell the graph showing the variation of cut of voltage (Vo) with frequency (n) of incident light is best represented by                                   [DCE 2001; MP PET 2003]
  A)
                                       done clear
  B)
                               done clear
  C)
                                   done clear
  D)
                      done clear
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• question_answer13)
  The curve between current (i) and potential difference (V) for a photo cell will be
  A)
                                    done clear
  B)
                            done clear
  C)
                                         done clear
  D)
  done clear
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• question_answer14)
             The correct curve between the stopping potential (V) and intensity of incident light (I) is
  A)
                                      done clear
  B)
                               done clear
  C)
                                       done clear
  D)
     done clear
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• question_answer15)
  The value of stopping potential in the following diagram
  A)
             ? 4V done clear
  B)
             ? 3 V done clear
  C)
             ? 2V done clear
  D)
             ? 1 V done clear
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• question_answer16)
  In the following diagram if V2 > V1 then
  A)
             \[{{\lambda }_{1}}=\sqrt{{{\lambda }_{2}}}\] done clear
  B)
             \[{{\lambda }_{1}}<{{\lambda }_{2}}\] done clear
  C)
             \[{{\lambda }_{1}}={{\lambda }_{2}}\] done clear
  D)
             \[{{\lambda }_{1}}>{{\lambda }_{2}}\] done clear
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• question_answer17)
  A point source of light is used in an experiment on photoelectric effect. Which of the following curves best represents the variation of photo current (i) with distance  of the source from the emitter
  A)
             a done clear
  B)
             b done clear
  C)
             c done clear
  D)
             d done clear
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• question_answer18)
  According to Einstein?s photoelectric equation, the plot of the kinetic energy of the emitted photo electrons from a metal versus  the frequency, of the incident radiation gives a straight line whose slope                                  [AIEEE 2004]
  A)
             Is the same for all metals and independent of the intensity of the radiation done clear
  B)
             Depends on the intensity of the radiation done clear
  C)
             Depends both on the intensity of the radiation and the metal used done clear
  D)
             Depends on the nature of the metals used done clear
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• question_answer19)
  The stopping potential \[({{V}_{0}})\] versus frequency (n) plot of a substance is shown in figure the threshold wave length is
  A)
             \[5\times {{10}^{14}}m\] done clear
  B)
             6000Å done clear
  C)
             5000 Å                                      done clear
  D)
             Cannot be estimated from given data done clear
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• question_answer20)
  Figure represents a graph of kinetic energy (K) of photoelectrons (in eV) and frequency (v) for a metal used as cathode in photoelectric experiment. The work function of metal is
  A)
             1 eV done clear
  B)
             1.5 eV done clear
  C)
             2 eV done clear
  D)
             3 eV done clear
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• question_answer21)
  Figure represents the graph of photo current I versus applied voltage (V). The maximum energy of the emitted photoelectrons is
  A)
             2eV done clear
  B)
             4 eV done clear
  C)
             0 eV done clear
  D)
             4 J done clear
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• question_answer22)
  The graph that correctly represents the relation of frequency n of a particular characteristic X-ray with the atomic number Z of the material is
  A)
                                   done clear
  B)
                            done clear
  C)
                                   done clear
  D)
  done clear
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• question_answer23)
  The intensity distribution of X-rays from two coolidge tubes operated on different voltages V1 and V2 and using different target materials of atomic numbers Z1 and Z2 is shown in the figure. Which one of the following inequalities is true?
  A)
             V1 > V2, Z1 < Z2 done clear
  B)
             V1 > V2, Z1 > Z2 done clear
  C)
             V1 < V2, Z1 > Z2 done clear
  D)
             V1 = V2, Z1 < Z2 done clear
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• question_answer24)
  The correct graph between the maximum energy of a photoelectron and the inverse of wavelength of the incident radiation is given by the curve
  A)
             A done clear
  B)
             B done clear
  C)
             C done clear
  D)
             None of the above done clear
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• question_answer25)
  The continuous x-ray spectrum obtained from a Coolidge tube is of the form
  A)
                                    done clear
  B)
                             done clear
  C)
                                    done clear
  D)
                             done clear
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• question_answer26)
  The dependence of the short wavelength limit \[{{\lambda }_{\min }}\] on the accelerating potential V is represented by the curve of figure
  A)
             A done clear
  B)
             B done clear
  C)
             C done clear
  D)
             None of these done clear
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• question_answer27)
  The variation of wavelength \[\lambda \] of the \[{{K}_{\alpha }}\] line with atomic number Z of the target is shown by the following curve of
  A)
             A done clear
  B)
             B done clear
  C)
             C done clear
  D)
             None of these done clear
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• question_answer28)
  In the graph given below. If the slope is \[4.12\times {{10}^{-15}}\]V-sec, then value of ?h? should be
  A)
             \[6.6\times {{10}^{-31}}\] J-sec done clear
  B)
             \[6.6\times {{10}^{-34}}\]J-sec done clear
  C)
             \[9.1\times 10-31\] J-sec done clear
  D)
             None of these done clear
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• question_answer29)
  The curves (a), (b), (c) and (d) show the variation between the applied potential difference (V) and the photoelectric current (i), at two different intensities of light (I1 > I2). In which figure is the correct variation shown
  A)
                                       done clear
  B)
                               done clear
  C)
                                      done clear
  D)
                              done clear
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• question_answer30)
  The figure showing the correct relationship between the stopping potential V0 and the frequency n of light for potassium and tungsten is
  A)
                                     done clear
  B)
                             done clear
  C)
                                done clear
  D)
  done clear
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• question_answer31)
  The log-log graph between the energy E of an electron and its de-Broglie wavelength \[\lambda \] will be
  A)
                                      done clear
  B)
                              done clear
  C)
                                      done clear
  D)
  done clear
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• question_answer32)
             The graph between the square root of the frequency of a specific line of characteristic spectrum of X-rays and the atomic number of the target will be
  A)
                                     done clear
  B)
                              done clear
  C)
                                    done clear
  D)
                             done clear
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• question_answer33)
  In the diagram a graph between the intensity of X-rays emitted by a molybdenum target and the wavelength is shown, when electrons of 30 keV are incident on the target. In the graph one peak is of \[{{K}_{\alpha }}\] line and the other peak is of \[{{K}_{\beta }}\] line
  A)
             First peak is of \[{{K}_{\alpha }}\] line at 0.6 Å done clear
  B)
             Highest peak is of Ka line at 0.7 Å done clear
  C)
             If the energy of incident particles is increased, then the peaks will shift towards left             done clear
  D)
             If the energy of incident particles is increased, then the peaks will shift towards right done clear
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• question_answer34)
    The maximum value of stopping potential in the following diagram is
  A)
             ? 4V done clear
  B)
             ? 1V done clear
  C)
             ? 3V done clear
  D)
             ? 2V done clear
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• question_answer35)
  In a parabola spectrograph, the velocities of four positive ions P,Q,R and S are v1, v2, v3 and v4 respectively
  A)
             \[{{v}_{1}}>{{v}_{2}}>{{v}_{3}}>{{v}_{4}}\] done clear
  B)
             \[{{v}_{1}}<{{v}_{2}}<{{v}_{3}}<{{v}_{4}}\] done clear
  C)
             \[{{v}_{1}}={{v}_{2}}={{v}_{3}}={{v}_{4}}\] done clear
  D)
             \[{{v}_{1}}<<{{v}_{2}}>{{v}_{3}}<{{v}_{4}}\] done clear
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• question_answer36)
  In Thomson spectrograph experiment, four positive ions P,Q,R and S are situated on Y-X curve a shown in the figure
  A)
             The specific charge of R and S are same done clear
  B)
             The masses of P and S are same done clear
  C)
             The specific charges of Q and \[R\]are same done clear
  D)
             The velocities of R and S are same done clear
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• question_answer37)
  The slope of frequency of incident light and stopping potential graph for  a given surface will be                [MP PET 1999; MP PMT 2000; JIPMER 2001, 02; UPSEAT 2003]
  A)
             h     done clear
  B)
             h/e done clear
  C)
             eh   done clear
  D)
             e done clear
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• question_answer38)
  From the figure describing photoelectric effect we may infer correctly that                                          [KCET 2005]
  A)
             Na and Al both have the same threshold frequency done clear
  B)
             Maximum kinetic energy for both the metals depend linearly on the frequency done clear
  C)
             The stopping potentials are different for Na and Al for the same change in frequency done clear
  D)
             Al is a better photo sensitive material than Na done clear
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