Question # 1

A resistance used in voltmeter is called

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shunt resistance

high resistance

low resistance

zero resistance

Current is measured in

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volts

watt

ohm

ampere

Ammeter is used to measure

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voltage

resistance

voltage and current

current

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

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weak

strong and uniform

none-uniform

zero

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)

When the charged particle is projected at right angles to the field, then experienced by it will be:

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Maximum

Zero

qvB

Both (A) and (B)

Both (A) and (C)

When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into

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Voltmeter

Avometer

Ammeter

None of these

If volume of wire is 'AL' and there are 'n' numbers of charge carriers per unit volume, then the total number of charge carriers are

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n/AL

Al/n

nAL

nA/L

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

Avo-meter is used of measure the

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current, voltage

voltage, resistance

resistance, current

current, voltage and resistance

The force exerted on a conductor of length L, carrying current I when placed in a magnetic field B is given by

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F=IB/L

F= L x B/I

F = IL x B

F = IL . B

The current sensitivity of the galvanometer is

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C/BAN

BAN/C

CAN/B

CBN/A

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°

When current passes through a solenoid coil, it behaves like a

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loop

circle

bar magnet

none of these

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

When an electron enters in a magnetic field right angle to its motion, the magnitude of its velocity will be

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changed

zero

unchanged

none of these

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ECAT Physics Chapter 14 Electromagnetism Online Test MCQs With Answers

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