Question # 1

The most suitable material for permanent magnet is

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cobalt

iron

steel

alaminium

A meter wire carraying a current of 2A is at right angle to the uniform magnetic field of 0.5 Weber/m²The force on the wire is

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5N

4N

1.5N

6N

A charged particle moving at right angle to the magnetic field will experience

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minimum force

maximum force

zero

moderate force

If the number of turns of a solenoid (carrying a steady current I) is doubled without changing the length of a solenoid, then magnetic field:

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Becomes Half

Becomes double

Is not affected

Becomes one fourth

None of these

NmA^-1is commonly called:

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Weber

Apmere

Guass

Coulomb

None of these

Avo-meter is used of measure the

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current, voltage

voltage, resistance

resistance, current

current, voltage and resistance

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

In the expression of force experienced by electron, the direction of both v and B are

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parallel

zero

perpendicular

none of them

The force experienced by charged particle is maximum, if it moves

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parallel to magnetic field

perpendicular to magnetic field

opposite to the magnetic field

none of these

The galvanometer can be made sensitive if the value of the factor C/BAN is

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constant

small

large

none of these

The current is measured in

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volts

watt

ampere

ohm

The straight current carrying conductor experiences maximum force in a uniform magnetic field when it is placed

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parallel to the field

Perpendicular to the field

At an angle of 45 to the field

None of the above

For the conversion of galvanometer into voltmeter, we connect a

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small resistance in series with galvanometer

small resistance in parallel with galvanometer

high resistance in parallel with galvanometer

high resistance series with galvanometer

A galvanometer in which the coil comes to rest quickly after the current passed through it, or the current stopped form flowing through it, is called

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dead beat galvanometer

stable galvanometer

shunt galvanometer

sensitive galvanomter

The direction of lines of force depends upon the direction of

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voltage

current

charges

none of these

The force experienced by a single charge carrier moving with velocity 'v' i magnetic field of strength 'B' is given by

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F =q(v/B)

F=q²(v x B)

F=q(v x B)

F= vx B

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Physics ECAT Pre Engineering Chapter 14 Electromagnetism Online Test MCQs With Answers

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