Question # 1

Magnetic flux passing through a element whose vector area makes an angle0º with lines of magnetic force is:

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BACosѲ

Zero

BA

BA sinѲ

None of these

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)

A shunt resistance parallel to the galvanometer is used to convert it into

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avometer

millimeter

voltmeter

none of these

The magnetic field in the middle of a solenoid due to current is

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weak

strong and uniform

none-uniform

zero

Ammeter is used to measure

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voltage

resistance

voltage and current

current

It is customary represent a current flowing towards the reader by a symbol

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(x)

(+)

(.)

(-)

(÷)

The vector representation of force experience give the direction of

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magnetic field

current

length of conductor

force

A resistance used in galvanometer to make it voltmeter is called

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shunt resistance

high resistance

zero resistance

none of these

The CRO is used for displaying the waveform of a given

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current

voltage

both of them

none of them

In order to make a voltmeter, high resistance is connected with galvanometer, in

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perpendicular

may be paralled or pendicular

series

none of these

The SI unit of flux density is.

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Tesla

Weber

Gaun

Weber/meter

The voltage increases linearly with

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time

velocity

acceleration

torque

The e/m of an electron moving in a circular path in a magnetic field is equal to

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V/Br

V/B²r²

V²/Br²

V²/Br

Which is modified form of galvanometer

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potentiometer

battery

voltmeter

slide wire bridge

The SI unit of magnetic permeability is

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WB A^-1m^-1

WB mA^-1

WB Am^-1

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)

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