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

Magnetic induction is also called as:

Question # 2

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 # 3

Ammeter is used to measure

Question # 4

When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is

Question # 5

A magnetic force on an electron travelling with 108ms-1parallel to a field of strength 1 Wb m-2is

Question # 6

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

Question # 7

A field is uniform and much stronger:

Question # 8

Magnetic lines of force:

Question # 9

Centripetal force for electron is given by

Question # 10

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

Question # 11

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

Question # 12

Magnetic flux and flux density are related by

Question # 13

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

Question # 14

A shunt resistance parallel to the galvanometer is used to convert it into

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 charged particle is projected perpendicular to a uniform magnetic field its trajectory is
A. circular
B. elliptical
C. cycloid
D. straight line
2 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
3

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

Point the direction of N-S

B.

Set themselves tangential to the circle

C.

Point in the direction of E-W

D.

None of these
5 The vector representation of force experience give the direction of
A. magnetic field
B. current
C. length of conductor
D. force
6 A charged particle moving at right angle to the magnetic field will experience
A. minimum force
B. maximum force
C. zero
D. moderate force
7 Electron gun consist of
A. three anodes
B. heating cathode
C. three anodes
D. three anodes , heating cathode, grid
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 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
10 A current carrying conductor is placed at right angle to the magnetic field. The magnetic force experienced by the conductor is
A. minimum
B. maximum
C. zero
D. none of these

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