Semiconductor Diode

IMPORTANT

Semiconductor Diode: Overview

This topic covers concepts, such as, Photo Diode, Light-Emitting Diode, Applications of Multimeter & Multimeter etc.

Important Questions on Semiconductor Diode

HARD
IMPORTANT

Which of the following circuit diagram of pn junction diode is (i) forward bias and in (ii) reverse bias:
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EASY
IMPORTANT

From the given transfer characteristic of a transistor in CE configuration, the value of power gain of this configuration is 10x, for RB=10 , and RC=1 . The value of x is _____.

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EASY
IMPORTANT

In an n-p-n common emitter (CE) transistor the collector current changes from 5 mA to 16 mA for the change in base current from 100 μA and 200 μA, respectively. The current gain of transistor is _____.

MEDIUM
IMPORTANT

If each diode has a forward bias resistance of 25Ω  in the below circuit,

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Which of the following options is correct?

EASY
IMPORTANT

In the given circuit, the current I through the battery will be

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EASY
IMPORTANT

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R

Assertion A: Diffusion current in a p-n junction is greater than the drift current in magnitude if the junction is forward biased.

Reason R: Diffusion current in a p-n junction is form the n-side to the p-side if the junction is forward biased.

In the light of the above statements, choose the most appropriate answer from the options given below.

EASY
IMPORTANT

The diagram shows the formation process of a p-n junction diode Identify the arrow representing

(i) Electron Diffusion

(ii) Electron Drift

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EASY
IMPORTANT

Following circuit contains diodes with forward bias having resistance 25 Ω and reverse bias having infinite resistance. The ratio of I1I2 is equal to

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EASY
IMPORTANT

In the given figure, a p-n Junction is

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EASY
IMPORTANT

Alternating voltage is given across P and Q, and output is taken across S and T. Choose the correct option for output voltage.

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EASY
IMPORTANT

In the given circuit, the equivalent resistance (inΩ ) between A and B is (if A has positive
potential and B has negative potential) (Diodes are assumed to be ideal)

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EASY
IMPORTANT

For the circuit shown in the figure, the output is

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MEDIUM
IMPORTANT

4 ideal diodes are connected as shown in the circuit, the current through 50 Ω is

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EASY
IMPORTANT

Identify the incorrect statement with respect to depletion layer.

EASY
IMPORTANT

The increase in the width of the depletion region in a p-n junction diode is due to:

EASY
IMPORTANT

In the given circuit, the approximate value of voltage drop Vo across R is

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HARD
IMPORTANT

Explain the operation of the following circuit with neat sketch of the input output waveforms. Consider all the diodes are ideal.

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HARD
IMPORTANT

Determine output waveform, V0 for the following networks considering all the diodes are ideal.

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HARD
IMPORTANT

Explain the operation of the following circuit with neat sketch of the input output waveforms. Consider all the diodes are ideal.

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MEDIUM
IMPORTANT

Sketch the voltage across the central 2.2  resistor as a function of time. Take current in left direction as positive.

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