Question # 1

In full wave rectification number of diodes required are equal to.

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2

3

4

5

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

The ratio Beta in transistor is called.

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Voltage gain

Emitter gain

Current gain

Nuclear gain

The average gap for Germanium at 0K is

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1.12 ev

0.02 ev

6.72 ev

7.2 ev

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

For normal use:

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Emitter base function is reversed biased

Collector base junction is reserved biased

Emitter base junction is forward biased

Both c and b

Depletion region carries.

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-ve charge

+ve charge

Ions

No charge

The potential difference across the depletion region of germanium is.

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0.3 V

0.5 V

0.7 V

0.8 V

In a transistor, collector current is controlled by:

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Collector voltage

Base current

Collector resistance

All of the above

The impurity in the germinium is usually in the ratio of

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1:10⁶

1:10⁴

1:10⁸

1:10¹⁰

Improper bisting of a transistor circiut produces:

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Heavy loading of emitter current

Distortion in the output output signal

Excessive heat at collector terminal

Faculty location of load line

The input resistance of an op amplifier is.

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Low

High

Zero

Equal to output resistance

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

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Rectifier

Transistor

Battery

Diode

In case of reverse biasing, current is flown due to:

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Minority charge carriers

Majority charge carriers

Electrons

Protons

When a PN-Junction is reverse biased the depletion region is.

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Widened

Narrowed

Normal

None of these

The device which is used as amplifier and works with the negative feedback is.

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Operational amplifier

P-n-p transistor

n-p-n transistor

Transistor

Logic gate can control some physical parameters like.

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Temperature, Pressure

Resistance, Inductance

Capacitance, Impedance

Current, voltage

Transistors are made from

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Plastics

Metals

Insulator

Doped semi conductors

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