Question # 1

The force experienced by an electron projected in a magnetic field B with a velocity V is given by

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F=e(V x B)

F= -e(V x B)

F= e(B x V)

Both a and c

The pointer of a magnetic compass:

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Is affected only by permanent magnets

Align itself parallel to the applied magnetic field

Vibrates in the magnetic field of the current

Aligns itself perpendicular to the magnetic field

Both (C) and (D)

A resistance used in galvanometer to make it voltmeter is called

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shunt resistance

high resistance

zero resistance

none of these

41 The force experience, when proton projected in a magnetic field with velocity 'v' is

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+e(v x B)

-C(V x B)

+e²(v x B)

-e(v²x B)

The permeability of free space is measured in:

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Wb/Am

Wb A/m

Am/Wb

m/Web A

None of these

The voltage increases linearly with

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time

velocity

acceleration

torque

The gavanometer constant of a moving coil galvanometer is given by

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K=BAN/C

K=BN/CA

K=NAC/B

K=C/BAN

F = I(L x B) is a

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vector

scalar

unit vector

none of these

Electron gun consist of

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three anodes

heating cathode

three anodes

three anodes , heating cathode, grid

A current carrying conductor sets up its own:

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Electric field

Nuclear field

Magnetic field

Both (A) and (C)

All of these

Magnetic induction is also called as:

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Ampere’s law

Faraday’s law

Lenz’s law

Newton’s law

Coulomb’s law

The unit of magnetic flux is

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Weber-m²

Weber-m³

Henry

Weber

The torque per unit twist of coil is called

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proportionality constant

gravitational constant

boltzman constant

coupling constant

A solenoid is a coil of wire which is:

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Short, loosely wound, cylindrical

Long, tightly wound, spherical

Long, loosely wound, cylindrical

Long, tightly wound, cylindrical

None of these

CRO deflects the beam of

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proton

a-particle

electron

neutron

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