Question # 1

Number of poles in a magnet is:

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One

Two

Three

Unlimited

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

A.C generator works on the principle of:

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Electrostatic induction

Electromagnetic induction

Law of gravitation

Third law of motion

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

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Negative

Positive

High positive

Zero positive

Who discovered Electromagnetic induction?

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Michael Faraday

Flemiing

Ohm

Coulomb

Iron core is used in tranformer to:

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Enhance the flux

Decrease the flux

Keep flux the same

botha a and b

The refractive index of ice is:

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1.00

1.33

1.31

2.42

What is the direction of the magnetic field lines inside a bar magnet?

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From north pole to south pole

From south pole to north pole

From side to side

There are no magnetic field lines.

In NOT gate number of input terminals is/are:

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1

2

3

4

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

When an electric current passes through a conductor, which field is produced around it?

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Electric field

Magnetic field

Gravitational field

Electrostatic field

Transformer which increase voltage is called.

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Step-up transformer

Step down transformer

D.C.Moter

A.C.genrator

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