Question # 1

The total number of lines of magnetic induction pasing through a surface perpendicular to the magnetic field is called

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magnetic flux

magnetic flux density

magnetic induction

magnetic field intensity

Galvanometer is a device used for the detection of

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voltage

current

temperature

pressure

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

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

Flurescent screen is a screen where visible spot

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vanishes

is made

becomes small and large

none of these

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 current in microamperes required to produce one millimeter deflection on a scale placed one meter away from the mirror of the galvanometer, defined the sensitivity of

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ammeter

voltmeter

galvanometer

avo-meter

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 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

The force exerted on a conductor of length L, carrying current I when placed in a magnetic field B is given by

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F=IB/L

F= L x B/I

F = IL x B

F = IL . B

The working of galvanometer depends upon torque exerted on a current carrying coil in

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magnetic field

electric field

gravitational field

nuclear field

Which one of the following relations is correct?

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1 Wb-m²= Nm^-1A^-1

1 tesla = 104 gausses

1 Wb-m²= 1 tesla

All of the above

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

Which is modified form of galvanometer

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potentiometer

battery

voltmeter

slide wire bridge

The SI unit of magnetic induction is

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Gauses

Tesla

Weber

Weber²

The force acting as one meter length of the conductor placed at right angle to the magnetic field, when one A current is passing through it, defines the

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magnetic flux

magnetic induction

magnetic field

self inductance

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