Question # 1

In order to increase sensitivity of galvanometer the value of C may be

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Increase

Decrease

Neither increase nor decrease

Remain same

A voltmeter is always connected in

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Parallel

Series

Perpendicular

Straight line

In current carrying long solenoid the magnetic field produced does not depend upon.

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The radius of solenoid

Number of turns per unit length

Current flowing through solenoid

All of the above

When charge particle enter perpendicular to magnetic field, the path followed by it is:

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A helix

A circle

Straight line

Ellipes

A galvanometer is an electrical instrument used to

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Measure resistance

Measure voltage

Detect passage of current

None of these

Weber is the unit of

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Magnetic flux

Permeability

magnetic force

None of above

Which one of the following resistance is used to convert a Galvanometer into an ammeter.

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High resistance

Low resistance in series with galvanometer

Shunt

High resistance in series with galvanometer

The brightness of the spot of CRO screen is controlled by.

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Anode

Cathode

Grid

Deflecting plates

If a charge is at rest in a magnetic field then force on charge is

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Zero

Double

One fourth

Four times

The SI unit of E is NC-1 and that of B is Na-1 m-1 then the unit of E/B is.

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ms-2

ms

ms^-1

m-1s-1

NIBA =

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cθ

θ/c

c²θ

c²/θ

e/m=

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v/Br

Br/V

VB/r

Vr/B

1 tesla =

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1 MAm^-1

1NA^-1m

1NA^-1m^-1

None of above

The unit of Magnetic flux is called.

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weber

weber/m²

NM^-1A^-1

None of above

Two parallel wires carrying currents in the opposite direction.

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Repel each other

Attract each other

Have no effect upon each other

They cancel out their individual magnetic fields.

The name of the scientist who noted that a compass needle was deflected when placed near the current carrying conductor

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Henry

Faraday

Coloumb

Oersted

For accurate measurement of current through a circuit, the resistance of ammeter should be

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Very small

Very high

Neither small nor high

None of the above

The sensitivity of galvanometer is given by

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CAN/B

C/BAN

BAN/C

BN/CA

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