Question # 1

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

Which diode works at reverse biasing.

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LED

Photo voltaic cell

Photo diode

Silicon diode

A two inputs NAND gat with inputs a and b has an output '0' if.

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B is zero

A is zero

Both A and B are 1

Both A and B are '0'

Conversation of only one half of A.C. into D.C. is called.

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Half wave amplification

Wave amplification

Half wave electrification

Half wave rectification

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

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Rectifier

Transistor

Battery

Diode

A diode characteristics curve is a plot between

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Current and resistance

Voltage and time

Voltage and current

Current and time

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

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1

2

3

4

The open loop gain of the amplifier is order of.

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10⁶

10⁵

10⁷

10³

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

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Minority charge carriers

Majority charge carriers

Electrons

Protons

In case of op-amp as an inverting amplifier, V₊ - V_- = 0, this is because

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Open gain loop is very low

Closed loop gain is very high

Open loop gain is very high

Both (a) and (a)

The P.D develop in case of germanium is:

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0.3

0.7

0.5

0.9

The p-n junction in which p side is connected to+ive and n-side is -ve the junction is said to be:

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Neutral

Forward biased

Reversed biased

None of above

The output of two input is zero only when its.

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Both inputs are zero

Either input is zero

Both inputs are one

Either input is one

Which one has greater cone of impurity among all:

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Emitter

Base

Collector

All are pure

Greater concentration of impurity is added in.

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Base

Emitter

Collector

LED

Which device is used as a rectifier?

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Capacitor

Transistor

Diode

Transformer

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

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2

3

4

5

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

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Inductor

Rectifier

Comparator

emf

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