Question # 1

The unit of magnetic flux is

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Weber-m²

Weber-m³

Henry

Weber

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

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)

For the conversion of galvanometer into voltmeter, we connect a

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small resistance in series with galvanometer

small resistance in parallel with galvanometer

high resistance in parallel with galvanometer

high resistance series with galvanometer

The current sensitivity of the galvanometer is

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C/BAN

BAN/C

CAN/B

CBN/A

The most suitable material for permanent magnet is

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cobalt

iron

steel

alaminium

The straight current carrying conductor experiences maximum force in a uniform magnetic field when it is placed

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parallel to the field

Perpendicular to the field

At an angle of 45 to the field

None of the above

The magnetic field inside a solenoid can be increased by:

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Increasing n

Decreasing I

Increasing I

By using iron core within solenoid

All correct except (B)

To convert galvanometer into ammeter we connect

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small resistance in parallel with galvanometer

small resistance in series with galvanometer

high resistance in series with galvanometer

high resistance in parallel with galvanometer

The SI unit of magnetic induction is

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Gauses

Tesla

Weber

Weber²

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

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

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