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question_answer1) The temperature (T) dependence of resistivity (r) of a semiconductor is represented by [AIIMS 2004]
question_answer2) In a forward biased PN-junction diode, the potential barrier in the depletion region is of the form ? [KCET 2004]
question_answer3) Different voltages are applied across a P-N junction and the currents are measured for each value. Which of the following graphs is obtained between voltage and current [MP PET 1996; UPSEAT 2002]
question_answer4) If the following input signal is sent through a PN-junction diode, then the output signal across RL will be
question_answer5) The curve between charge density and distance near P-N junction will be
question_answer6) The resistance of a germanium junction diode whose \[V-I\] is shown in figure is \[({{V}_{k}}=0.3V)\]
question_answer7) In the half-wave rectifier circuit shown. Which one of the following wave forms is true for \[{{V}_{CD}}\], the output across C and D?
question_answer8) The output in the circuit of figure is taken across a capacitor. It is as shown in figure
question_answer9) A full wave rectifier circuit along with the input and output voltages is shown in the figure The contribution to output voltage from diode ? 2 is [MP PMT 2001]
question_answer10) A source voltage of 8V drives the diode in fig. through a current-limiting resistor of 100 ohm. Then the magnitude of the slope load line on the V-I characteristics of the diode is
question_answer11) The i-V characteristic of a P-N junction diode is shown below. The approximate dynamic resistance of the P-N junction when a forward bias of 2volt is applied
question_answer12) The given figure shows the wave forms for two inputs A and B and that for the output Y of a logic circuit. The logic circuit is [UPSEAT 2002] (Y)
question_answer13) In a negative logic the following wave form corresponds to the
question_answer14) The variation of anode current in a triode corresponding to a change in grid potential at three different values of the plate potential is shown in the diagram. The mutual conductance of the triode is [CPMT 1986, 88]
question_answer15) The point representing the cut off grid voltage on the mutual characteristic of triode is
question_answer16) For a thermionic emitter (metallic) if J represents the current density and T is its absolute temperature then the correct curve between \[{{\log }_{e}}\frac{J}{{{T}^{2}}}\] and \[\frac{1}{T}\] is
question_answer17) If the thermionic current density is J and emitter temperature is T then the curve between \[\frac{J}{{{T}^{2}}}\] and \[\frac{1}{T}\] will be
question_answer18) The mutual characteristic of triode is
question_answer19) The value of amplification factor from the following graph will be
question_answer20) The correct curve between voltage gain \[({{A}_{v}})\] and load resistance \[({{R}_{L}})\] is
question_answer21) The curve between the work function of a metal \[({{\varphi }_{o}})\] and its temperature (T) will be
question_answer22) The plate characteristic curve of a diode in space charge limited region is as shown in the figure. The slope of curve at point P is 5.0 mA/V. The static plate resistance of diode will be
question_answer23) The ratio of thermionic currents (I/I0) for a metal when the temperature is slowly increased \[{{T}_{0}}\] to \[T\] as shown in figure. (I and I0 are currents at T and respectively). Then which one is correct? [Orissa JEE 2002]
question_answer24) The frequency response curve of RC coupled amplifier is shown in figure. The band width of the amplifier will be
question_answer25) The figure represents variation of triode parameter (m or rp or gm) with the plate current. The correct variation of m and rp are given, respectively by the curves
question_answer26) The mutual characteristic curves of a triode are as shown in figure. The cut off voltage for the triode is
question_answer27) For the diode, the characteristic curves are given at different temperature. The relation between the temperatures is [RPET 1990]
question_answer28) The output current versus time curve of a rectifier is shown in the figure. The average value of the output current in this case is [AIIMS 1982]
question_answer29) Which of the following figures correctly shows the phase relation between the input signal and the output signal of triode amplifier
question_answer30) In the figure four plate characteristics of a triode at different grid voltage are shown. The difference between successive grid voltage is 1 V. Which curve will have maximum grid voltage and what is its value?
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