ECAT Pre Computer Science Chapter 14 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 14 Electromagnetism

Try The MCQ's Test For ECAT Physics Chapter 14 Electromagnetism

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ECAT Physics Chapter 14 Electromagnetism

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Question # 1

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

Question # 2

the current is pass through the straight wire. The magnetic field established around it has its lines of force:

Question # 3

Strength of magnetic field is measured in SI units, in:

Question # 4

Magnetic induction is also called as:

Question # 5

The direction of lines of force depends upon the direction of

Question # 6

Method "lamp and scale arrangement" used to measure the

Question # 7

The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon

Question # 8

The SI unit of magnetic permeability is

Question # 9

The SI unit of magnetic induction is

Question # 10

Centripetal force for electron is given by

Question # 11

A resistance used in galvanometer to make it voltmeter is called

Question # 12

The pointer of a magnetic compass:

Question # 13

To convert galvanometer into ammeter we connect

Question # 14

The sources of magnetic field are

Question # 15

When some compass needles are placed on a card board along a circle with the center at the wire, they will

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 Resistance is measured in
A. volts
B. ampere
C. ohm
D. watt
2 A magnetic force on an electron travelling with 108ms-1parallel to a field of strength 1 Wb m-2is
A. Zero
B. 105 m
C. 10-10N
D. 108N
3 When current passes through a solenoid coil, it behaves like a
A. loop
B. circle
C. bar magnet
D. none of these
4 At a given instant, a photon moves in +x direction in a region where there magnetic field in -z direction. The magnetic force on the proton will be the:
A. -y direction
B. +y direction
C. +z direction
D. -z direction
5 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
A. n/AL
B. Al/n
C. nAL
D. nA/L
6 A beam of electrons is provided by an
A. electron gun
B. Suppray
C. Injection
D. None of these
7

The pointer of a magnetic compass:
A.

Is affected only by permanent magnets

B.

Align itself parallel to the applied magnetic field

C.

Vibrates in the magnetic field of the current

D.

Aligns itself perpendicular to the magnetic field
8 The force experienced by an electron projected in a magnetic field B with a velocity V is given by
A. F=e(V x B)
B. F= -e(V x B)
C. F= e(B x V)
D. Both a and c
9 The CRO is used for displaying the waveform of a given
A. current
B. voltage
C. both of them
D. none of them
10 The most suitable material for permanent magnet is
A. cobalt
B. iron
C. steel
D. alaminium

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