Question # 1

A galvanometer is an instrument used to

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measure voltage across a circuit

detect current in a circuit

measure current flowing through a circuit

none of these

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 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

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

Ammeter is used to measure

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voltage

resistance

voltage and current

current

The magnetic field outside the solenoid due to current is

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strong

zero

weak

uniform

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

The SI unit of magnetic flux is

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NmA^-2

NmA^-1

NAm^-1

Nm²A^-1

Flurescent screen is a screen where visible spot

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vanishes

is made

becomes small and large

none of these

Strength of magnetic field is measured in SI units, in:

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N

N/Am

Am/N

Nm/A

None of these

41 The force experience, when proton projected in a magnetic field with velocity 'v' is

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+e(v x B)

-C(V x B)

+e²(v x B)

-e(v²x B)

The sources of magnetic field are

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isolated magnetic poles

charges at rest

charges in motion

none of these

Hold the solenoid in the right hand with fingers curling in the direction of current. The direction of the field will be given by:

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Thumb

Curled fingers

Middle finger

Arm of right hand

None of these

The SI unit of flux density is

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Newton/Amp-meter

Newton-m/Ampere

Newton-m/Amp²

Newton-Amp/meter

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)

In a straight current carrying conductor, the direction of magnetic field can be found by

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right hand rule

left hand rule

head to tall rule

none of these

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