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If the half-wave rectifier input signal is V=220sinωt and load resistance is 2 kΩ, then output DC current is:-

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Important Questions on Semiconductor Devices

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Beta Question Bank for Medical: Physics>Chapter 35 - Semiconductor Devices>Exercise (Previous Year Questions)>Q 86

Output for the following Boolean circuit is:-

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Beta Question Bank for Medical: Physics>Chapter 35 - Semiconductor Devices>Exercise (Analytical Questions)>Q 1
An electric field is applied to a semiconductor. Let the number of charge carries be n and the average drift speed be v. If the temperature is increased,
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Beta Question Bank for Medical: Physics>Chapter 35 - Semiconductor Devices>Exercise (Analytical Questions)>Q 2
In a sample of pure silicon 103 atom cm-3 is mixed with phosphorus. If all donor atoms are active then what will be resistivity at 20ºC if the mobility of electron is 1200 cm2 V-1 s-1:-
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Beta Question Bank for Medical: Physics>Chapter 35 - Semiconductor Devices>Exercise (Analytical Questions)>Q 3
Mobility of electrons in n-type Ge is 5000 cm2 V-1 s-1 and conductivity is  5 mho cm-1. If effect of holes is negligible, then impurity concentration will be
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Beta Question Bank for Medical: Physics>Chapter 35 - Semiconductor Devices>Exercise (Analytical Questions)>Q 4
If the two ends of a p-n junction are joined by a wire, 
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Beta Question Bank for Medical: Physics>Chapter 35 - Semiconductor Devices>Exercise (Analytical Questions)>Q 6

The output across the diode in the given circuit is in the figure.

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Beta Question Bank for Medical: Physics>Chapter 35 - Semiconductor Devices>Exercise (Analytical Questions)>Q 7
During regulation action of a Zener diode correct statement is :-
(a) the current and voltage across the Zener remains fixed.
(b) the current through the series resistance Rs changes.
(c) the Zener resistance is constant.
(d) the resistance offered by the Zener diode changes.
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Beta Question Bank for Medical: Physics>Chapter 35 - Semiconductor Devices>Exercise (Analytical Questions)>Q 8
To reduce the ripples in a rectifier circuit with capacitor filter
(a)    RL should be increased.
(b)    Input frequency should be decreased.
(c)    Input frequency should be increased.
(d)    Capacitors with high capacitance should be used.