Question # 1

Magnetic effect of electric current was first discovered by:

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Faraday

Ampere

Volta

Lenz

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.

When we heat the metal at high temperature they emit:

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Holes

Protons

Neutrons

Electrons

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

The voltage is decreased by:

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Step-up transformer

Step-down transformer

A.C. generator

D.C. Motor

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

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Circular

Straight

Solenoid

None of these

The magnetic field of a solenoid resembles as:

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Iron wire

U-shape magnet

Bar magnet

Point charge.

In totally reflecting prism one angle is of:

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45°

90°

180°

120°

Changing magnetic field in a closed circuit can induce:

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e.m.f

Electric current

Force

Both A and B

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

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