Question # 1

The output voltage of a rectifier is.

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Smooth

Pulsating

Alternating

Per featly direct

A light emitting diode emits light only when

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Reverse biased

Forward biased

Unbiased

None of these

Base of transistor is of order:

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10^-11m

10⁶m

10^-8m

10^-6m

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

Automatic function of street light can be done by the use of.

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Inductor

Rectifier

Comparator

emf

The use of LDR is in the circuit of.

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Logic gate

Rectifier

Oscillator

High Switch

A transistor has parts:

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2

3

4

5

In a transistor, collector current is controlled by:

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Collector voltage

Base current

Collector resistance

All of the above

The gate, which changes the logic level to its opposite level is called

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NOR gate

AND gate

OR gate

NOT gate

The device which are required to convert various physical quantities into electric voltage are called.

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Filters

Rectifiers

Amplifiers

Sensors

Minimum number of semi conductor diodes required for full wave rectification are.

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1

2

3

4

The term invertor is used for.

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NOR gate

XNOR gate

NAND gate

NOT gate

The circuit of full wave rectification consist of

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Three diodes

Four diodes

Two diodes

One diode

NAND gate represented by:

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X = A. B

X = A+B

X= A.B

X=|A+B|

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

Transistor was discovered by

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Young

Curie

John Bardeen

Shale's

Photodiode is used for:

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Detection of current

Detection of heat

Detection of light

Both a & b

The potential difference across depletion region in case of Si is

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0.6 volt

0.9 volt

0.7 volt

0.2 volt

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