Question # 1

Reverse current flows due to

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Majority charge carriers

Minority charge carriers

Electrons

Holes

For automatic Switching of streetlight, the op amplifier is used as.

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Inductor

Converter

Comparator

Thermistor

The P.D develop in case of silicon is:

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0.7V

0.3V

0.5V

0.9V

Transistor was invented by:

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Bardeen

Micheal faraday

Lenz

Newton

A diode characteristic curve is a plot between

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Current and time

Voltage and time

Voltage and current

Forward voltage and reverse voltage

A.C. can be converted into D.C. by

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An oscillator

Detector

An amplifier

Rectifier

For normal transistor the emitter current can be given by

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I_E = I_C

I_E = I_C + I_B

I_E = I_B

None of these

Transistors are made from

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Plastics

Metals

Insulator

Doped semi conductors

Rectification is the process of converting.

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D.C. into A.C.

A.C. in to D.C.

Low signal to high

High signal to low

In an N-type silicon, which of the following statement is true?

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Electrons are majority carriers & trivalent atoms are the dopants

Electrons are majority carriers & pentavalent atoms are the dopants

Holes are minority carriers & pentavalent atoms are the dopants.

Holes are minority carriers & trivavalent atoms are the dopants.

One use of a single p-n junction semiconductor in an electrical circuit is a

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Rectifier

Transistor

Battery

Diode

When transistor are used in digital circuits they usually operate in the :

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Active region

Break down region

Saturation & cutoff regions

Linear region

The resistance between the inverting (-) and non inverting inputs is called Input resistance and is the order of.

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Ohms

Kilo Ohms

Mega Ohms

Thounds Ohms

A light emitting diode emits light only when

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Reverse biased

Forward biased

Unbiased

None of these

The average gap for Germanium at 0K is

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1.12 ev

0.02 ev

6.72 ev

7.2 ev

the number of terminals in a semiconductor diode are

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2

3

4

5

The central region of a transistor is called.

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Emitter

Collector

Base

Neutral

Truth table of logic function.

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Summarize its output values only

Tabulates all its input conditions only

Display all its input and output possibility

Is not base on logic algebra

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