Question # 1

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

When a coil is moved in a uniform magnetic field, an induced emf is produced due of change in

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Flux density

Electric flux

Magnetic flux

Magnetic field strength

1 rad =

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0.001Gy

0.01Gy

0.1Gy

1.01Gy

The condition for the wheatstone bridge to be balanced is given by

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None of above

Lenz's law is a consequence of the law of conservation of

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Charge

Momentum

Energy

Angular momentum

The galvanometer can be made sensitive by making the factor BAN/C

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Large

Small

Constant

Zero

The magnitude of motional emf is given by

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Joule second is the unit of.

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Energy

Wein's constant

Planck's constant

Boyle's law

A device used for detection of current is called.

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Inductor

Voltmeter

Capacitor

Galvanometer

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

Photo diode is used for detection of.

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Heat

Magnet

Current

Light

The series in visible region is:

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Balmer series

Pfund series

Paschen series

None of above

The effective value of any sinusoidal alternating current or voltage is

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None of the above

Net charge enclosed by Gaussian surface is:

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zero

maximum

depend on intensity

none of all

Intensity of field inside a hollow charged sphere will be.

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Negative

Unaffected

Zero

Maximum

A soft iron cylinder is placed inside coil galvanometer to:

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Make field circular and strong

Make field radial and weak

Make field radial and strong

All of above

In A.C circuit through a capacitor which one is:

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Current leads voltage by 90^∘

Current lags behind voltage by 90^∘

Both will be in phase

None of above

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