Question # 1

When current passes through a solenoid coil, it behaves like a

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loop

circle

bar magnet

none of these

The angle of deflection of coil can be measured by the

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one method

three method

two method

none of these

The SI unit of magnetic permeability is

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WB A^-1m^-1

WB mA^-1

WB Am^-1

None of these

When an electron enters in a magnetic field right angle to its motion, the magnitude of its velocity will be

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changed

zero

unchanged

none of these

Gauss(G) is smaller unit of magnetic induction which is related to tesla(T) as

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IT = 10^-4G

IT = 10⁵G

IT = 10³G

IT = 10⁴G

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)

The force experienced by a single charge carrier moving with velocity 'v' i magnetic field of strength 'B' is given by

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F =q(v/B)

F=q²(v x B)

F=q(v x B)

F= vx B

The SI unit of magnetic flux is.

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weber

Nm^-1A^-1

tesla

gauss

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)

How many number of anodes used in electron gun

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one

two

three

six

In a moving coil galvanometer, the deflecting couple depends upon

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area of the coil

number of turns of coil

value of magnetic field

all of the above

A magnetic force on an electron travelling with 10⁸ms^-1parallel to a field of strength 1 Wb m^-2is

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Zero

10⁵m

10^-10N

10⁸N

Amperean path is a:

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Closed path

Rectangular path

Circular path

Any of above

Broken path

If current through conductor is 1 A and length of conductor is 1m placed at right angle to the magnetic field, then the strength of magnetic field is

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F = B²

F = 0

F = B

F = B/2

Galvanometer is a device used for the detection of

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voltage

current

temperature

pressure

Electron gun consist of

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three anodes

heating cathode

three anodes

three anodes , heating cathode, grid

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