When a voltage is applied to a semiconductor crystal then the free electrons wil

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Question
When a voltage is applied to a semiconductor crystal then the free electrons will flow.
Options
A. towards positive terminal
B. towards negative terminal
C. either towards positive terminal or negative terminal
D. towards positive terminal for 1 ?s and towards negative terminal for next 1 ?s

Correct Answer

towards positive terminal

Explanation

Since electrons are negatively charged they will flow towards positive terminal.

Electronic Devices and Circuits problems

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2. In which region of a CE bipolar transistor is collector current almost constant?
Options
A. Saturation region
B. Active region
C. Breakdown region
D. Both saturation and active region

3. The v-i characteristics of a FET is shown in figure. In which region is the device biased for small signal amplification
Options
A. AB
B. BC
C. CD
D. BD

4. In which of these is reverse recovery time nearly zero?
Options
A. Zener diode
B. Tunnel diode
C. Schottky diode
D. PIN diode

5. Crossover distortion behaviour is characteristic of
Options
A. class A O/P stage
B. class B O/P stage
C. class AB output stage
D. common pulse O/P state

6. In a bipolar transistor the barrier potential
Options
A. 0
B. a total of 0.7 V
C. 0.7 V across each depletion layer
D. 0.35 V

7. The word enhancement mode is associated with
Options
A. tunnel diode
B. MOSFET
C. JFET
D. photo diode

8. At very high temperatures the extrinsic semi conductors become intrinsic because
Options
A. drive in diffusion of dopants and carriers
B. band to band transition dominants over impurity ionization
C. impurity ionization dominants over band to band transition
D. band to band transition is balanced by impurity ionization

9. A potential of 7 V is applied to a silicon diode. A resistance of 1 K ohm is also in series with the diode. The current is
Options
A. 7 mA
B. 6.3 mA
C. 0.7 mA
D. 0

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