Question # 1

The number of lines of force in a magnetic field depends upon.

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Shape of coil

Sixe of coil

Magnet

Strength of field

Which statement is true about the magnetic poles?

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Unlike poles repel

Like poles attract

Magnetic poles do not effect each other

A single magnetic pole does not exist

When you rub a plastic rod against your hair several times and put it near some bits of paper, the pieces of papers are attracted towards it. What does this observation indicate:

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The rod and the paper are oppositely charged

The rod acquires a positive charge

The rod and the paper have the same charges

The rod acquires a negative charge

The refracted light striking to the side of prism is called:

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Refracted ray

Incident ray

Reflected ray

Emergent ray

In SI the unit of charge is:

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Joule

Volt

Coulomb

Watt

In A.C. generator flux will be zero if coil is to the field.

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90^o

45^o

Parallel

Inclined

The end of solenoid from which lines of force emerge out is called:

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North pole

South pole

North and south pole

None of these

Changing magnetic field in a closed circuit can induce:

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e.m.f

Electric current

Force

Both A and B

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

In totally reflecting prism one angle is of:

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45°

90°

180°

120°

A positive electric charge:

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Attracts other positive charge

Repels other positive charge

Attract a neutral charge

Repels a neutral charge

A current carrying conductor produces a field around it is called:

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Electric field

Magnetic field

Both a and b

None of these

If the current in a wire which is placed perpendicular to a magnetic field increases, the force on the wire.

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Increases

Decreases

Remains the same

Will be zero

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Physics 10th Class English Medium Unit 6 Online Test MCQs With Answers

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