Question # 1

e/m=

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v/Br

Br/V

VB/r

Vr/B

A positive charge is moving towards an observer, The direction of magnetic induction will be.

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Toward right

Anti clockwise

Clockwise

Toward left

Magnetic flux density at a point due to current carrying coil is determined by

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Ampere's law

Faraday's law

Lenz's law

Gauss's law

The permeability of free space is measured in

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wb A/m

Am/wb

wb/Am

m/wbA

A Current flowing towards the reader is denoted by.

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Cross

a bracket

A dot

Positive sign

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 anodes in cathode ray oscilloscope.

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Control number of waves

Control brightness of sept formed

Accelerate as well as focus beam

Negative potential w.r.t to chithode

Grid in cathode ray oscilloscope controls.

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Number of electron

Temperature of filament

Frequency of electron

Energy of electrons

The vector sum of electric force and magnetic force is called:

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Deflecting force

Lorentz force

Newton force

Faraday's force

An electron moves at 2 x 10² m/sec perpendicular to magnetic field of 2T what is the magnitude of magnetic force:

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1 x 10^-6 N

6.4 x 10^-17 N

3.6 x 10^-24 N

4 x 10⁶ N

If an electron is prijected in a magnetic field with velocity V, it will experience a force

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Weber is the unit of

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Magnetic flux

Permeability

magnetic force

None of above

Cathode ray oscilloscope works by deflecting a beams

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Neutrons

Protons

Electrons

Positron

Torque on a current carrying coil

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τ=IBA cos

τ = ILB sinα

τ = IBA sinα

τ = ILBcosα

The unit of Magnetic flux is called.

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weber

weber/m²

NM^-1A^-1

None of above

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

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

Write the SI unit of magnetic flux.

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Tesla

Weber

Weber m-2

Tesla m2

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