Question # 1

For a normal person audible frequency range for sound wave lies between:

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10 Hz and 10kHz

20Hz and 20 kHz

25 Hz and 25 kHz

30Hz and 30 kHz

In variable capacitor, dielectric medium is:

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Paper

Air

Mica

Ceramic

The open switch Boolean expression is represented by:

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0

1

10

2

A converging lens becomes a magnifying glass when an object is placed:

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Outside of focal length

Inside the focal length

Equal of focal length

At double of focal length

The relation between v,f andλ of a wave is:

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vf=λ

fλ = v

vλ =f

v=λ/f

First voice signal was transmitted in the form of electrical signal in:

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1870

1875

1876

1880

Electronics is the study of principles by means of which we control the:

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Flow of electrons.

Nuclear fission

Fusion reaction

Radiations

The unit of electric power is:

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Volt

Watt

Joule

Coulomb

A thermistor is a dependent resistors:

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Heat

temperature

energy

mass

Which we double the voltage in a simple electric circuit. We double the

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Current

Power

Resistance

both a and b

Hard disk is made of:

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Aluminium

Copper

Iron

Plastic

The rate of flow of charge through any cross-sectional area is called:

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potential difference

Energy

Coulomb

Electric current

Positive charge can be produced by:

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Combing in hair

Rubbing glass rod on silk

By rubbing ebonite rod on wool

By rubbing glass rod wool

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