Question # 1

The torque in the coil can be increased by increasing:

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No. of turns

Current and magnetic field

Area of coil

All of the above

The unit of permiability of free space is:

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T.m/A

T.m²/A

T.m/A²

None of these

An electron enters the magnetic field at right angle from left, B is into paper. The electron will be deflected.

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upward

To ward right

Down ward

Toward left

The unit of magnetic induction B is

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Coulomb

Ampere

Coulomb/ampere

Weber/m²

When a charge is projected perpendicular to a uniform magnetic field, tis path is

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Spiral

Helix

Ellipse

Circular

NIBA =

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cθ

θ/c

c²θ

c²/θ

1 tesla =

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1 MAm^-1

1NA^-1m

1NA^-1m^-1

None of above

A voltmeter is always connected in

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Parallel

Series

Perpendicular

Straight line

Lorentz force means the force acting on a particle, which is

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Magnetic force only

Electric force only

Sum of electric and magnetic force

None of these

CRO works by deflecting the beam of electron as they pass through

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Uniform magnetic field

Uniform electric field between two sets of parallel plates

Non-uniform magnetic field

None of these

μ_∘(Ampere's constant) has value.

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4πx10^-7 WbA^-1m^-1

4πx10^-17 Wbm²

4πx10⁷ WbA^-1m^-1

4πx10-27 Wb/m²

e/m=

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v/Br

Br/V

VB/r

Vr/B

The value of e/m is smallest for

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Proton

Electron

Beta particle

Positron

A charged particle enters in a strong magnetic field its K.E.

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Remain constant

Increases

Decreases

Increases then decreases

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

An AVO meter can also be called as.

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Digital multimeter

Digital voltmeter

Digital ammeter

Digital ohm meter

The e/m of a neutron is

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Less than electron

The same as electron

Zero

Greater than election

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