ECAT Pre Engineering Physics Chapter 14 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 14 Electromagnetism

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

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Physics ECAT Pre Engineering Chapter 14 Electromagnetism

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Question # 1

Electron gun consist of

Question # 2

Galvanometer is a device used for the detection of

Question # 3

The current is measured in

Question # 4

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 # 5

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

Question # 6

The CRO is used for displaying the waveform of a given

Question # 7

Lorentz force is defined as

Question # 8

A beam of electrons is provided by an

Question # 9

Which is modified form of galvanometer

Question # 10

The angle of deflection of coil can be measured by the

Question # 11

The SI unit of magnetic flux is

Question # 12

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

Question # 13

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

Question # 14

The galvanometer can be made sensitive if the value of the factor C/BAN is

Question # 15

Charge to mass ratio (e/m) of an electron is given by the relation

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 When an electron enters in a magnetic field right angle to its motion, the magnitude of its velocity will be
A. changed
B. zero
C. unchanged
D. none of these
2

Amperean path is a:
A.

Closed path

B.

Rectangular path

C.

Circular path

D.

Any of above
3 Gauss(G) is smaller unit of magnetic induction which is related to tesla(T) as
A. IT = 10-4 G
B. IT = 105G
C. IT = 103G
D. IT = 104G
4 Electron gun consist of
A. three anodes
B. heating cathode
C. three anodes
D. three anodes , heating cathode, grid
5 When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into
A. Voltmeter
B. Avometer
C. Ammeter
D. None of these
6 The torque per unit twist of coil is called
A. proportionality constant
B. gravitational constant
C. boltzman constant
D. coupling constant
7 To convert galvanometer into ammeter we connect
A. small resistance in parallel with galvanometer
B. small resistance in series with galvanometer
C. high resistance in series with galvanometer
D. high resistance in parallel with galvanometer
8 magnetic field is a:
A.

Vector quantity

B.

Scalar quantity

C.

Scalar as well as scalar quantity

D.

Any of (A) or (B)
9 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
10 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

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