Question # 1

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

When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is

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90°

75°

0°

180°

A charged particle moving at right angle to the magnetic field will experience

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minimum force

maximum force

zero

moderate force

The voltage increases linearly with

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time

velocity

acceleration

torque

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

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

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circular

elliptical

cycloid

straight line

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

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)

The SI unit of flux density is.

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Tesla

Weber

Gaun

Weber/meter

The torque per unit twist of coil is called

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proportionality constant

gravitational constant

boltzman constant

coupling constant

The most suitable material for permanent magnet is

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cobalt

iron

steel

alaminium

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

if the field is directed along the normal to the area, then flux is:

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Maximum

Equal to zero

Equal to BA

Minimum

Both (A) and (C)

A full-scale deflection is obtained in a galvanometer with a current of few

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ampere

volts

milliampere

ohm

If volume of wire is 'AL' and there are 'n' numbers of charge carriers per unit volume, then the total number of charge carriers are

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n/AL

Al/n

nAL

nA/L

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

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