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

Lorentz force is defined as

Question # 2

Electron gun consist of

Question # 3

The SI unit of flux density is.

Question # 4

A solenoid is a coil of wire which is:

Question # 5

Current is measured in

Question # 6

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

Question # 7

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

Question # 8

Flurescent screen is a screen where visible spot

Question # 9

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

Question # 10

The SI unit of magnetic permeability is

Question # 11

Weber is a unit of

Question # 12

In a moving coil galvanometer, the deflecting couple depends upon

Question # 13

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 # 14

Magnetic flux passing through a element whose vector area makes an angle0º with lines of magnetic force is:

Question # 15

The e/m of an electron moving in a circular path in a magnetic field is equal to

Question # 16

The CRO is used for displaying the waveform of a given

Question # 17

The voltage increases linearly with

Question # 18

Magnetic induction is also called as:

Question # 19

Which is modified form of galvanometer

Question # 20

A current carrying conductor sets up its own:

Question # 21

A resistance used in voltmeter is called

Question # 22

The current sensitivity of the galvanometer is

Question # 23

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

Question # 24

Gauss(G) is smaller unit of magnetic induction which is related to tesla(T) as

Question # 25

The force experienced by charged particle is maximum, if it moves

Question # 26

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

Question # 27

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

Question # 28

A resistance used in galvanometer to make it voltmeter is called

Question # 29

Magnetic lines of force:

Question # 30

The pointer of a magnetic compass:

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 It is customary represent a current flowing towards the reader by a symbol
A. (x)
B. (+)
C. (.)
D. (-)
2 magnetic field is a:
A.

Vector quantity

B.

Scalar quantity

C.

Scalar as well as scalar quantity

D.

Any of (A) or (B)
3 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
4 For measuring large currents, an ordinary galvanometer cannot be used without proper, then both relates with each other as
A. modification
B. voltage
C. current
D. resistance
5 When the charged particle is projected at right angles to the field, then experienced by it will be:
A. Maximum
B. Zero
C. qvB
D. Both (A) and (B)
6 A beam of electrons is provided by an
A. electron gun
B. Suppray
C. Injection
D. None of these
7 Charge to mass ratio (e/m) of an electron is given by the relation
A. e/m = 2V/Br2
B. e/m = 2V/B2r
C. e/m = 2V/B2r2
D. e/m = V/2B2r2
8 When charged particle is projected perpendicular to a uniform magnetic field its trajectory is
A. circular
B. elliptical
C. cycloid
D. straight line
9 The SI unit of magnetic induction is tesla which is equal to
A. Newton/ampere-meter or N/A-m
B. Newton/ampere2-meter or N/A2-m
C. Newton/ampere2-meter2 or N/A2-m2
D. Newton/ampere2-meter2or N/A2-m2
10 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

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