Question # 1

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

The vector sum of electric force and magnetic force is called:

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Deflecting force

Lorentz force

Newton force

Faraday's force

The unit of permiability of free space is:

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T.m/A

T.m²/A

T.m/A²

None of these

Brightness of screen of CRO controlled by

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Grid

Filament

Anode

Cathode

A device used for detection of current is called.

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Inductor

Voltmeter

Capacitor

Galvanometer

An electron enters the magnetic field at right angle from left, B is into paper. The electron will be deflected.

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upward

To ward right

Down ward

Toward left

A voltmeter is always connected in

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Parallel

Series

Perpendicular

Straight line

The SI unit of flux density is.

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NA-1 m2

NA-1 m-1

NAm-1

NA-1 m

In CRO, the output waveform of time base generator is

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Circular

Square

Sinusoidal

Saw-toothed

The Weber is unit of measure of:

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Conductance

Electric current

Magnitic flux

Electric flux

The torque in the coil can be increased by increasing:

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No. of turns

Current and magnetic field

Area of coil

All of the above

To convert a galvanometer into a volt meter a high resistance is connected.

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In series

In parallel

In perpendicular

Along tangent

Magnetic flux density at a point due to current carrying coil is determined by

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Ampere's law

Faraday's law

Lenz's law

Gauss's law

The e/m of a neutron is

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Less than electron

The same as electron

Zero

Greater than election

Current passing through the coil of galvanometer

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CO/BAN

CoN /BA

NAB/CO

AN/BCO

Energy stored per uint volume inside a solenoid is called as

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energy density

Electric flux

Work

Volume charge density

Magnetic induction can be measured in units of.

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Tesla

Gauss

Weber/m2

All of the above

Torque is produced in a current carrying coil when it is placed in a

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Magnetic field

Electric field

Gravitational field

Nuclear field

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