Question # 1

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

The circuit of full wave rectification consist of

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Three diodes

Four diodes

Two diodes

One diode

The P.D develop in case of silicon is:

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0.7V

0.3V

0.5V

0.9V

NAND gate represented by:

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X = A. B

X = A+B

X= A.B

X=|A+B|

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.

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

Base of transistor is of order:

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10^-11m

10⁶m

10^-8m

10^-6m

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'

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

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Inductor

Converter

Comparator

Thermistor

The output from a full wave rectifier is

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An ac voltage

A dc voltage

Zero

A pulsating unidirectional voltage

The semi conductor diode has the property of

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Two way conduction

Zero conduction

One way conduction

Amplification

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

The sensor of light is.

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Transistor

LED

Diode

Light dependent resistance

The average gap for Germanium at 0K is

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1.12 ev

0.02 ev

6.72 ev

7.2 ev

Depletion region carries.

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-ve charge

+ve charge

Ions

No charge

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

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1

2

3

4

In photovoltaic cell, current is directly proportional to.

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Wavelength of light

Intensity of light

Energy

Frequency of light

The term invertor is used for.

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NOR gate

XNOR gate

NAND gate

NOT gate

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