Question # 1

The SI unit of magnetic permeability is

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WB A^-1m^-1

WB mA^-1

WB Am^-1

None of these

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

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

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ampere

volts

milliampere

ohm

The SI unit of magnetic flux is

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NmA^-2

NmA^-1

NAm^-1

Nm²A^-1

The SI unit of magnetic induction is tesla which is equal to

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Newton/ampere-meter or N/A-m

Newton/ampere²-meter or N/A²-m

Newton/ampere²-meter² or N/A²-m²

Newton/ampere²-meter²or N/A²-m²

F = I(L x B) is a

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vector

scalar

unit vector

none of these

Centripetal force for electron is given by

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mv²/ r

mv / r²

mv²/ r

mr²/ v

The force acting on a charge moving in a magnetic field

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is perpendicular to the both magnetic field and direction of motion

is proportional to the magnetic of charges

vanishes when the motion is directly opposite to the direction of field

all of the above

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

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

The SI unit of magnetic induction is

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Gauses

Tesla

Weber

Weber²

The vector representation of force experience give the direction of

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magnetic field

current

length of conductor

force

Magnetic flux passing through a element whose vector area makes an angle0º with lines of magnetic force is:

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BACosѲ

Zero

BA

BA sinѲ

None of these

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

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constant

small

large

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

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