Question # 1

If current through conductor is 1 A and length of conductor is 1m placed at right angle to the magnetic field, then the strength of magnetic field is

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F = B²

F = 0

F = B

F = B/2

A magnetic force on an electron travelling with 10⁸ms^-1parallel to a field of strength 1 Wb m^-2is

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Zero

10⁵m

10^-10N

10⁸N

A full-scale deflection is obtained in a galvanometer with a current of few

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ampere

volts

milliampere

ohm

The CRO is used for displaying the waveform of a given

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current

voltage

both of them

none of them

Amperean path is a:

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Closed path

Rectangular path

Circular path

Any of above

Broken path

The SI unit of magnetic permeability is

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WB A^-1m^-1

WB mA^-1

WB Am^-1

None of these

The vector representation of force experience give the direction of

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magnetic field

current

length of conductor

force

The direction of lines of force depends upon the direction of

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voltage

current

charges

none of these

When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is

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90°

75°

0°

180°

A beam of electrons is provided by an

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electron gun

Suppray

Injection

None of these

The total number of lines of magnetic induction pasing through a surface perpendicular to the magnetic field is called

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magnetic flux

magnetic flux density

magnetic induction

magnetic field intensity

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

To convert galvanometer into ammeter we connect

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small resistance in parallel with galvanometer

small resistance in series with galvanometer

high resistance in series with galvanometer

high resistance in parallel with galvanometer

The magnetic field outside the solenoid due to current is

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strong

zero

weak

uniform

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

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

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ECAT Physics Chapter 14 Electromagnetism Online Test MCQs With Answers

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