Question # 1

Lorentz force means the force acting on a particle, which is

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Magnetic force only

Electric force only

Sum of electric and magnetic force

None of these

The SI Unit of magnetic induction is.

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Weber

Tesla

Gauss

Newton

A Current flowing towards the reader is denoted by.

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Cross

a bracket

A dot

Positive sign

If the length and number of turns of a solenoid are doubled strength of magnetic field with.

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Be doubled

Become half

Not change

Be four time

The sum of electric and magnetic force is called.

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Maxwell force

Lorentz force

Newton's force

Centripetal force

One weber is equal to:

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N.A ²/m

N.m²/A

N.A/m

N.m/A

Magnetic flux density is measured in

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Weber

Weber/m2

Tesla -m

Gauss

The sensitivity of Galvanometer can be increased by:

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Increasing C/BAN factor

Decreasing C/BAN factor

Increasing angle θ

All of above

An electron moves at 2 x 10² m/sec perpendicular to magnetic field of 2T what is the magnitude of magnetic force:

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1 x 10^-6 N

6.4 x 10^-17 N

3.6 x 10^-24 N

4 x 10⁶ N

Shunt resistance is

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Low resistance

Zero resistance

High resistance

Impedance

If the length of solenoid is doubled but N same, B inside the solenoid becomes.

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Half

Doubled

One fourth

Four times

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

In current carrying long solenoid the magnetic field produced does note depend upon

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The radius of solenoid

Number of turns per unit length

Current flowing through solenoid

All of above

A photon while passing thorugh a magnetic field are deflected towards:

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North pole

South pole

Are ionized

None of these

An ammeter is an electrical instrument which is used to measure.

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Voltage

Current

Resistance

None

The magnetic field is uniform and stronger

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Outside the solenoid

Inside the solenoid

At the central part of the solenoid

None of these

The unit of magnetic induction is:

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Tesla

Weber

Weber metre

NAm^-1

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