Question # 1

Transistor was invented by:

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Bardeen

Micheal faraday

Lenz

Newton

The gain of transistor amplifier depends upon

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Resistance connected with collector

Resistance connected with base voltage

Input voltage

Output voltage

_______ is the building block of every electronic circuit.

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Semi conductor diode

Resistor

Capacitor

Amplifier

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

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Filters

Rectifiers

Amplifiers

Sensors

The use of LDR is in the circuit of.

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Logic gate

Rectifier

Oscillator

High Switch

The chargeless region after formation of Pn junction is called:

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Free region

Depletion region

Field region

U.V region

A device which converts low voltage or current to high voltage or current is called.

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Transformer

AC generator

Amplifier

Rectifier

Transistor was discovered by

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Young

Curie

John Bardeen

Shale's

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

A photo diode can turn its current ON and OFF in

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Micro seconds

Mega seconds

Nano seconds

Mili seconds

The colour of light emitted by a LED depends on.

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It forward biased

Its reverse biased

Unbiased

None of these

The open loop gain of the amplifier is order of.

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10⁶

10⁵

10⁷

10³

Photo diode is used for detection of.

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Heat

Magnet

Current

Light

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

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Inductor

Rectifier

Comparator

emf

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

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

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1

2

3

4

A PN junction can not be sued a.

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Rectifier

Amplifier

Detector

LED

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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