Question # 1

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 device used for detection of current is called.

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Inductor

Voltmeter

Capacitor

Galvanometer

CRO works by deflecting the beam of electron as they pass through

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Uniform magnetic field

Uniform electric field between two sets of parallel plates

Non-uniform magnetic field

None of these

If an electron is prijected in a magnetic field with velocity V, it will experience a force

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The unit of Magnetic flux is called.

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weber

weber/m²

NM^-1A^-1

None of above

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

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Deflecting force

Lorentz force

Newton force

Faraday's force

Current passing through the coil of galvanometer

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CO/BAN

CoN /BA

NAB/CO

AN/BCO

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

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 sensitivity of galvanometer is given by

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CAN/B

C/BAN

BAN/C

BN/CA

In order to measure potential difference voltmeter is always connected in.

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Series

Parallel

Both a and b

Neither in series nor in parallel

___ is correct relation.

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IT = 10^-4G

IT = 10⁴ G

IT = 10² G

IT = 10^-2 G

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 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 moving charge is surrounded by:

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2 Fields

3 Fields

4 Fields

None of these

The magnetic flux will be max, For an angle of:

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0°

60°

90°

180°

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

In order to increase sensitivity of galvanometer the value of C may be

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Increase

Decrease

Neither increase nor decrease

Remain same

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