Question # 1

In a straight current carrying conductor, the direction of magnetic field can be found by

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right hand rule

left hand rule

head to tall rule

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

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

(CRO) Cathode ray oscilloscope is a device used for high speed

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velocity

graph plotting

time-velocity

none of these

The field around a moving charge is called

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magnetic field

conservative field

non-conservative field

none of these

In the formula B= µ̻ nl, the symbol n denotes:

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Total number of turns of solenoid

Number of turns per unit length

Number of turns per unit volume

Numbers of turns per unit area

Number of moles

F = I(L x B) is a

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vector

scalar

unit vector

none of these

A resistance used in galvanometer to make it voltmeter is called

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shunt resistance

high resistance

zero resistance

none of these

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

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minimum force

maximum force

zero

moderate force

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 unit of magnetic flux is

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Weber-m²

Weber-m³

Henry

Weber

The CRO deflects the beam of electrons, when they passes through uniform

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electric field

gravitational field

magnetic flax

magnetic field

Magnetic flux passing through the an element of are A placed perpendicular to a uniform magnetic field Bis:

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Maximum

Minimum

Zero

Very small

None of these

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

The sources of magnetic field are

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isolated magnetic poles

charges at rest

charges in motion

none of these

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

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