Question # 1

Current passing through the coil of galvanometer

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CO/BAN

CoN /BA

NAB/CO

AN/BCO

The magnetic field inside solenoid is given:

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μ_∘nI²

μ_∘nI

μ_∘n/1²

μ_∘I/n

If the number of turns become double but length remain same, then magnetic field in the solenoid become.

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Half

Double

Remain same

Zero

The SI unit of magnetic permeability is.

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WbA-1m-1

Wbm-2

WbmA-1

WbAm-1

The sensitivity of Galvanometer can be increased by:

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Increasing C/BAN factor

Decreasing C/BAN factor

Increasing angle θ

All of above

Brightness of screen of CRO controlled by

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Grid

Filament

Anode

Cathode

Ampere's law is applicable to:

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Circular path

Rectangular path

To any closed path

Nonwe of these

The unit of magnetic induction is:

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Tesla

Weber

Weber metre

NAm^-1

Cathode ray oscilloscope works by deflecting a beams

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Neutrons

Protons

Electrons

Positron

If the length and number of turns of a solenoid are doubled strength of magnetic field with.

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Be doubled

Become half

Not change

Be four time

To convert a galvanometer into an ammeter, we connect with it a

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Shunt resistance

Low value parallel

Low value by pass resistor

All of above

The force on a charge particle moving parallel to magnetic field is:

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Maximum

Minimum

Zero

None of these

Two parallel wires carrying currents in the opposite direction.

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Repel each other

Attract each other

Have no effect upon each other

They cancel out their individual magnetic fields.

The galvanometer can be made sensitive by making the factor BAN/C

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Large

Small

Constant

Zero

Torque on a current carrying coil

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τ=IBA cos

τ = ILB sinα

τ = IBA sinα

τ = ILBcosα

The conductor experience force, placed in magnetic above:

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Move towards weaker part of field

Move towards stronger part of field

Remains at rest

Move upwards in space

Force on a charged particle is zero when projected at angle with magnetic field.

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0 ^o

90^o

180^o

270^o

The unit of Magnetic flux is called.

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weber

weber/m²

NM^-1A^-1

None of above

A device used for detection of current is called.

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Inductor

Voltmeter

Capacitor

Galvanometer

The dimensions of magnetic flux are

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M¹L^-2T¹A¹

MLT^-2A^-1

ML²T²A^-1

ML²T^-2A^-1

The SI unit of magnetic induction 'B' Tesla is equal to.

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NA-1m-1

Nam-1

NA-1 m

Na2m-1

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