Question # 1

Which instrument is used to measure current, resistance and potential difference:

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Galvanometer

Digital meter

Voltmeter

Ammeter

The equivalent resistance of a parallel combination is:

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Equal to sum of all resistance

Is greater than the largest resistance of combination

Is smaller than the smallest resistance of combination

All of these

It is used in satellite communication:

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Radio waves

Micro waves

Light waves

Electrical waves

Which of the following characteristics of a wave is independent of the others:

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speed

frequency

amplitude

wavelength

The number of wavelength of waves passing through a point in one secnd is called:

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Time period

Cycle

Frequency

None of these

The principal focus of a concave mirror is:

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Virtual

Real

Imaginary

Dual aspect

Number of poles in a magnet is:

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One

Two

Three

Unlimited

Which instrument is used to detect current:

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Galvanometer

Voltmeter

Ammeter

Electroscope

Old people can not hear sound above then _____ Hz

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1000

15000

20000

10000

A 3Ω resistor having 2A current will dissipate the power of:

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12W

4W

6W

8W

Hard disk is made of:

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Aluminium

Copper

Iron

Plastic

The standard group of bits in digital electronic is:

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5 bits

6 bits

7 bits

8 bits

The amount of current that causes the loss of muscle control is:

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0.1A

0.015A

2A

1A

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