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- 1. Multiple Choice
Main phenomenons associated with formation of p-n junctions are
Drift only
Diffusion only
Diffusion and Drift
only doping
- 2. Multiple Choice
The region on either side of the junction which becomes free from the mobile charge carriers is called
Energy gap region
Charge free region
Diffusion region
Depletion region
- 3. Multiple Choice
Potential barrier developed in the depletion region depends on ( choose two correct options)
Dopant concentration
Temperature
intrinsic carrier concentration
type of material
- 4. Multiple Choice
Magnitude of current developed during diffusion and drift respectively are
Micro and mA
nA and mA
mA and Micro ampere
Micro and nA
- 5. Multiple Choice
What are ripples
DC supplied by a cell
AC component in household circuits
AC component that remains in rectified circuit
AC component that remains in filtered circuit
- 6. Multiple Choice
Device used for filter circuit is
Diode
Capacitor
Transistor
Amplifier
- 7. Multiple Choice
The main constructional difference between Half wave and Full wave rectifier
Number of parts used in 1st type is Half of parts used in 2nd type
Some kind of half wave is used in 1st type
use of Centre tapping in case of 1st type and not in 2nd type
use of Centre tapping in case of 2nd type and not in 1st type
- 8. Multiple Choice
Characteristics of a diode that helps in rectification
Allows Unidirectional flow of current
Allows Bidirectional flow of current
Opposes the flow of current
conducts in reverse biased
- 9. Multiple Choice
The output wave form of a full wave rectifier is
an AC voltage
an DC voltage
Zero
a pulsating unidirectional voltage
- 10. Multiple Choice
The p-n junction which generates an emf when solar radiation falls on it, with no external bias applied, is a
Light Emitting diode
Photodiode
Solar cell
Zener Diode
- 11. Multiple Choice
Zener diodes are mostly used for
rectifier circuits
Filter Circuits
solar cells
Voltage regulator circuits
- 12. Multiple Choice
In the forward bias arrangement of a p-n junction diode,
the n-end is connected to the positive terminal of the battery
the p-end is connected to the positive terminal of the battery
the direction of current is from n-end to p-end in the diode
the p-end is connected to the negative terminal of the battery
- 13. Multiple Choice
Principle behind using zener diode as a voltage regulator is
Increase in input voltage decreases the voltage drop across the resistor by supplying constant voltage supply through the through the output
Decrease in input voltage increases the voltage drop across the resistor by supplying constant voltage supply through the through the output
Increase/decrease in input voltage Increase/decreases the voltage drop across the resistor by supplying constant voltage supply through the through the output
None of these
- 14. Multiple Choice
Resistance developed in the depletion region is
Rforward > Rreverse
Rforward < Rreverse
Rforward = Rreverse
None of these
- 15. Multiple Choice
V-I characteristics of a solar cell drawn in
First Quadrant
Fourth Quadrant
Second Quadrant
Third Quadrant
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