Question # 1

Who discovered Electromagnetic induction?

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Michael Faraday

Flemiing

Ohm

Coulomb

Eight bits combine to form:

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A byte

Megabyte

Kilobyte

Gigabyte

The minimum value of angle of deviation is called:

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Minimum angle

Incident angle

Angle of minimum deviation

None of these

A transformer has 100 turns in its primary and 500 turns in secondary coil. If 6 volts D.C is applied across its primary, the voltage induced across its secondary coil will be:

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0 volt

30 volts

45 volts

60 volts

Transformer Works on the principle of:

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Self induction

Mutual induction

Electro statatic

Induction

Changing magnetic field in a closed circuit can induce:

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e.m.f

Electric current

Force

Both A and B

According to Fleming's left hand rule the direction of magnetic field is indicated by:

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Thumb

Forefinger

Middle finger

Right hand rule

The true ratio of a transformer is 10. It means:

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Vs = 10Vp

Ns = Np/10

Ns = 10NP

VS= Vp/10

The step-up transformer

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Increases the input current

Increase the input voltage

Has more turns in the primary

Has less turns in hte secondary coil

The lines will be in the form of concentric circles, if conductor is:

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Circular

Straight

Solenoid

None of these

If current is flowing from bottom end to the top end in a wire, according to right hand rule the direction of line of forces would be:

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Anti-clock wise

Clock wise

Left and Right

Along the conductor.

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

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Negative

Positive

High positive

Zero positive

Which animal have ability to move his eye lens:

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Snake

Fish

Ant

Tiger

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