Question # 1

1 tesla =

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1 MAm^-1

1NA^-1m

1NA^-1m^-1

None of above

A sensitive galvanometer is

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Unstable

Stable

Moderate

Both B and C

The function of three anodes a C.R.O is

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To accelerate electrons only

To focus the electrons only

To control the brightness of spot on screen

To accelerate and focus the electrons

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

Brightness of screen of CRO controlled by

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Grid

Filament

Anode

Cathode

A positive charge is moving towards an observer, The direction of magnetic induction will be.

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Toward right

Anti clockwise

Clockwise

Toward left

In CRO, the output waveform of time base generator is

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Circular

Square

Sinusoidal

Saw-toothed

Energy stored per uint volume inside a solenoid is called as

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energy density

Electric flux

Work

Volume charge density

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

A device used for detection of current is called.

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Inductor

Voltmeter

Capacitor

Galvanometer

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

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Anode

Cathode

Grid

Deflecting plates

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 SI Unit of magnetic induction is.

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Weber

Tesla

Gauss

Newton

The Grid 'G' in cathode ray oscilloscope.

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Accelerate as well as focus electron beam

Control no. of electrons beam

Is at - Ve potential with respect to cathode.

Both d and b

A charged particle enters in a strong magnetic field its K.E.

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Remain constant

Increases

Decreases

Increases then decreases

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

A moving charge is surrounded by:

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2 Fields

3 Fields

4 Fields

None of these

The SI unit of flux density is.

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NA-1 m2

NA-1 m-1

NAm-1

NA-1 m

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