Question # 1

The SI Unit of magnetic induction is.

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Weber

Tesla

Gauss

Newton

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

The e/m of a neutron is

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Less than electron

The same as electron

Zero

Greater than election

A moving charge is surrounded by:

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2 Fields

3 Fields

4 Fields

None of these

μ_∘(Ampere's constant) has value.

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4πx10^-7 WbA^-1m^-1

4πx10^-17 Wbm²

4πx10⁷ WbA^-1m^-1

4πx10-27 Wb/m²

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

e/m=

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v/Br

Br/V

VB/r

Vr/B

If the number of turns become double but length remain same, then magnetic field in the solenoid become.

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Half

Double

Remain same

Zero

The SI unit of magnetic permeability is.

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WbA-1m-1

Wbm-2

WbmA-1

WbAm-1

Shunt resistance is

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Low resistance

Zero resistance

High resistance

Impedance

Magnetic induction can be measured in units of.

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Tesla

Gauss

Weber/m2

All of the above

A sensitive galvanometer is

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Unstable

Stable

Moderate

Both B and C

The effective way to increase the sensitivity of moving coil galvanometer is.

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Increase the area of coil

Increase the number of turn

Increase the magnetic field

Increase the value of constant C

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

In CRO, the output waveform of time base generator is

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Circular

Square

Sinusoidal

Saw-toothed

Sensitivity of a galvanometer can be increased by

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Decreasing the value of torsional couple

Decreasing number of turns

Decreasing area of plane of coil

Decreasing magnetic field

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

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

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