Question # 1

Which one is a safety device?

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Switch

Fuse

Circuit breaker

Both B and C

Which type of image is produced by the converging lens of human eye if it views a distant object:

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Real, erect, same size

Real, inverted, diminished

Virtual, erect, diminished

Virtual, inverted, magnified

A data storage device is:

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Printer

Hard disk

Monitor

CPU

the distance between two consecutive trough or crest is called:

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wavelength

frequency

time period

amplitude

A positive electric charge:

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Attracts other positive charge

Repels other positive charge

Attract a neutral charge

Repels a neutral charge

The speed of sound in air is kmh^-1

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1243

1244

1245

1246

If one of the resistors in a parallel circuit is removed, the total resistance will be:

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Doubled

Decreased

Increased

Remain same

Which gate is used for safety alarm:

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AND

NANAD

OR

NOR

Snell' law is:

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n = sin<x/sin <r

n=sin <i/sin<r

n = sin <r/sin<i

<i/<r

Give the number of factors which affect the ability of a capacitor to store charge.

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2

3

4

5

Power of electric heater is:

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1500W

4750W

100W

50W

Volt is named after the Italian physicist:

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Faraday

Alessandro volta

Newton

Coulomb

electric field is weak when:

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lines are far apart

lines are close together

no lines are present

lines are directed outside

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