Question # 1

The SI unit of magnetic permeability is

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WB A^-1m^-1

WB mA^-1

WB Am^-1

None of these

Magnetic induction is also called as:

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Ampere’s law

Faraday’s law

Lenz’s law

Newton’s law

Coulomb’s law

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)

Method "lamp and scale arrangement" used to measure the

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angle of deflection

restoring torque

magnetic field strength

current

When some compass needles are placed on a card board along a circle with the center at the wire, they will

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Point the direction of N-S

Set themselves tangential to the circle

Point in the direction of E-W

None of these

Point in direction of S-E

The pointer of a magnetic compass:

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Is affected only by permanent magnets

Align itself parallel to the applied magnetic field

Vibrates in the magnetic field of the current

Aligns itself perpendicular to the magnetic field

Both (C) and (D)

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

Electron gun consist of

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three anodes

heating cathode

three anodes

three anodes , heating cathode, grid

Avo-meter is used of measure the

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current, voltage

voltage, resistance

resistance, current

current, voltage and resistance

A beam of electrons is provided by an

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electron gun

Suppray

Injection

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

At a given instant, a photon moves in +x direction in a region where there magnetic field in -z direction. The magnetic force on the proton will be the:

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-y direction

+y direction

+z direction

-z direction

None of these

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