Question # 1

The torque per unit twist of coil is called

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proportionality constant

gravitational constant

boltzman constant

coupling constant

Current is measured in

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volts

watt

ohm

ampere

The strength of magnetic field around the current conductor is

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Smaller near the conductor

Greater near the conductor

Greater at the large distance from the conductor

Constant near and away from the conductor

Charge to mass ratio (e/m) of an electron is given by the relation

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e/m = 2V/Br²

e/m = 2V/B²r

e/m = 2V/B²r²

e/m = V/2B²r²

Galvanometer is a device used for the detection of

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voltage

current

temperature

pressure

NmA^-1is commonly called:

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Weber

Apmere

Guass

Coulomb

None of these

In the expression of force experienced by electron, the direction of both v and B are

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parallel

zero

perpendicular

none of them

Tesla is the unit of

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Magnetic induction or flux density

Magnetic flux

Self inductance

None of these

The galvanometer can be made sensitive if the value of the factor C/BAN is

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constant

small

large

none of these

The magnetic force exerted on an electron moving with velocity 'v' at right angle to the magnetic field is given by

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F=eVB

F=e²V/B

F=e/VB

F=B²/ev

The CRO is used for displaying the waveform of a given

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current

voltage

both of them

none of them

CRO deflects the beam of

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proton

a-particle

electron

neutron

A long wire wound tightly on a cylindrical core is called:

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Potentiometer

Solenoid

Toroid

Wheat and stone bridge

None of these

The vector representation of force experience give the direction of

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magnetic field

current

length of conductor

force

Lorentz force is defined as

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q(E + V x B)

q(E x B + V)

q(E x V + B)

q(E x B)

When charged particle is projected perpendicular to a uniform magnetic field its trajectory is

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circular

elliptical

cycloid

straight line

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