ECAT Pre General Science Physics Chapter 14 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 14 Electromagnetism

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

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ECAT Pre General Science Physics Chapter 14 Electromagnetism

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Question # 1

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:

Question # 2

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

Question # 3

The SI unit of magnetic permeability is

Question # 4

The torque per unit twist of coil is called

Question # 5

Resistance is measured in

Question # 6

The gavanometer constant of a moving coil galvanometer is given by

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

Current is measured in

Question # 11

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

Question # 12

If the value of galvanometer constant k = C/BAN is made small, the galvanometer can be made

Question # 13

magnetic field is a:

Question # 14

A resistance used in galvanometer to make it voltmeter is called

Question # 15

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

Question # 16

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

Question # 17

The voltage increases linearly with

Question # 18

Electron gun consist of

Question # 19

A solenoid is a coil of wire which is:

Question # 20

A resistance used in voltmeter is called

Question # 21

The most suitable material for permanent magnet is

Question # 22

Weber is a unit of

Question # 23

Which is modified form of galvanometer

Question # 24

The force acting as one meter length of the conductor placed at right angle to the magnetic field, when one A current is passing through it, defines the

Question # 25

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

Question # 26

A relationship between Gauses of magnetic induction and Tesla(T) is given by

Question # 27

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

Question # 28

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

Question # 29

The SI unit of magnetic induction is tesla which is equal to

Question # 30

The SI unit of flux density is

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The unit of flux density is also given by
A. Weber/m2or Wb . m-2
B. Weber/mor Wb . m
C. Weber/mor Wb . m-1
D. Weber or Wb
2

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

Circular and endless

B.

Oval in shape and endless

C.

Straight

D.

Parabolic
3 In a straight current carrying conductor, the direction of magnetic field can be found by
A. right hand rule
B. left hand rule
C. head to tall rule
D. none of these
4 A galvanometer is an instrument used to
A. measure voltage across a circuit
B. detect current in a circuit
C. measure current flowing through a circuit
D. none of these
5 The current in microamperes required to produce one millimeter deflection on a scale placed one meter away from the mirror of the galvanometer, defined the sensitivity of
A. ammeter
B. voltmeter
C. galvanometer
D. avo-meter
6 Which one of the following relations is correct?
A. 1 Wb-m2= Nm-1A-1
B. 1 tesla = 104 gausses
C. 1 Wb-m2= 1 tesla
D. All of the above
7 Magnetic flux passing through a element whose vector area makes an angle0º with lines of magnetic force is:
A. BACosѲ

B. Zero
C. BA
D. BA sinѲ
8 Which is modified form of galvanometer
A. potentiometer
B. battery
C. voltmeter
D. slide wire bridge
9 Lorentz force is defined as
A. q(E + V x B)
B. q(E x B + V)
C. q(E x V + B)
D. q(E x B)
10 The e/m of an electron moving in a circular path in a magnetic field is equal to
A. V/Br
B. V/B2r2
C. V2/Br2
D. V2/Br

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