Question # 1

Transformer which increase voltage is called.

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Step-up transformer

Step down transformer

D.C.Moter

A.C.genrator

In C.R.O grid is always connected with potential:

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Negative

Positive

High positive

Zero positive

Which is the most suitable means of reliable continuous communication between an orbiting satellite and Earth?

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Microwaves

Radio waves

Sound wave

any light waves

The amount of current that can be felt is:

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1A

0.1A

0.001 A

2A

In compound microscope, the objective have focal length than eye-piece:

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Smaller

Larger

Equal

Equal and larger

The speed of light in water is:

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2.0x10³ ms^-1

2.5x10³ ms^-1

2.3x10⁸ ms^-1

2.3x10^-8 ms^-1

The sound waves are the example of:

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Longitudinal waves

Transverse waves

Electromagnetic waves

x-rays

The half life of argon nuclide Ar-40 is:

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2 x 10⁸years

2 .2x 10⁸years

2.4x 10⁸years

2.8x 10⁸years

The speed of sound in iron at 25°C is:

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5950 m/sec

5900 m/sec

6950 m/sec

6940 m/sec

The intensity of lawn mover is:

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10^-1 wm^-2

10^-2wm^-2

10^-1wm^-3

10^-3wm^-2

The unit of electrical energy is:

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Joule

Watt

Volt

Electron volt(eV)

Mathematical formula of electromotive force (e.m.f) is:

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E = W/Q

E = Q/W

E = WQ

E = W2Q

the time period of body attached to spring depend on:

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mass

gravitational constant

length

amplitude

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