ECAT Pre General Science Chapter 14 online mcq test with answers for Physics chapter 14 (Electromagnetism)

Question # 1

When current passes through a solenoid coil, it behaves like a

loop A
circle B
bar magnet C
none of these D

Question # 2

A current carrying conductor is placed at right angle to the magnetic field. The magnetic force experienced by the conductor is

minimum A
maximum B
zero C
none of these D

Question # 3

If the number of turns of a solenoid (carrying a steady current I) is doubled without changing the length of a solenoid, then magnetic field:

Becomes Half A
Becomes double B
Is not affected C
Becomes one fourth D
None of these E

Question # 4

Magnetic flux and flux density are related by

Flux density = flux x area A
Flux density = flux / area B
Flux density = flux - area C
None of these D

Question # 5

F = I(L x B) is a

vector A
scalar B
unit vector C
none of these D

Question # 6

The angle of deflection of coil can be measured by the

one method A
three method B
two method C
none of these D

Question # 7

Avo-meter is used of measure the

current, voltage A
voltage, resistance B
resistance, current C
current, voltage and resistance D

Question # 8

magnetic field is a:

Vector quantity
A
Scalar quantity
B
Scalar as well as scalar quantity
C
Any of (A) or (B)
D
Neither (A) nor (B) E

Question # 9

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

Zero A
10⁵m B
10^-10N C
10⁸N D

Question # 10

The working of galvanometer depends upon torque exerted on a current carrying coil in

magnetic field A
electric field B
gravitational field C
nuclear field D

Question # 11

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

constant A
small B
large C
none of these D

Question # 12

The current is measured in

volts A
watt B
ampere C
ohm D

Question # 13

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

IT = 10^-4G A
IT = 10⁵G B
IT = 10³G C
IT = 10⁴G D

Question # 14

The CRO is used for displaying the waveform of a given

current A
voltage B
both of them C
none of them D

Question # 15

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

avometer A
millimeter B
voltmeter C
none of these D

Question # 16

The force acting on a charge moving in a magnetic field

is perpendicular to the both magnetic field and direction of motion A
is proportional to the magnetic of charges B
vanishes when the motion is directly opposite to the direction of field C
all of the above D

Question # 17

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

Point the direction of N-S
A
Set themselves tangential to the circle
B
Point in the direction of E-W
C
None of these
D
Point in direction of S-E E

Question # 18

Lorentz force is defined as

q(E + V x B) A
q(E x B + V) B
q(E x V + B) C
q(E x B) D

Question # 19

The SI unit of magnetic induction is

Gauses A
Tesla B
Weber C
Weber² D

Question # 20

Weber is a unit of

magnetic flux A
magnetic filed intensity B
magnetic induction C
magnetic flux density D

Question # 21

The force experienced by an electron projected in a magnetic field B with a velocity V is given by

F=e(V x B) A
F= -e(V x B) B
F= e(B x V) C
Both a and c D

Question # 22

The SI unit of flux density is.

Tesla A
Weber B
Gaun C
Weber/meter D

Question # 23

A current carrying conductor sets up its own:

Electric field
A
Nuclear field
B
Magnetic field
C
Both (A) and (C)
D
All of these E

Question # 24

The gavanometer constant of a moving coil galvanometer is given by

K=BAN/C A
K=BN/CA B
K=NAC/B C
K=C/BAN D

Question # 25

The most suitable material for permanent magnet is

cobalt A
iron B
steel C
alaminium D

Question # 26

The direction of lines of force depends upon the direction of

voltage A
current B
charges C
none of these D

Question # 27

The unit of magnetic flux is

Weber-m² A
Weber-m³ B
Henry C
Weber D

Question # 28

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

Heating effect of current A
Chemical effect of current B
Magnetic effect of current C
Electromagnetic effect of current D

Question # 29

When charged particle is projected perpendicular to a uniform magnetic field its trajectory is

circular A
elliptical B
cycloid C
straight line D

Question # 30

The current sensitivity of the galvanometer is

C/BAN A
BAN/C B
CAN/B C
CBN/A D

Sr.#	Question	Answer
1	F = I(L x B) is a	A. vector B. scalar C. unit vector D. none of these
2	Current is measured in	A. volts B. watt C. ohm D. ampere
3	A current carrying conductor sets up its own:	A. Electric field B. Nuclear field C. Magnetic field D. Both (A) and (C)
4	A shunt resistance parallel to the galvanometer is used to convert it into	A. avometer B. millimeter C. voltmeter D. none of these
5	The SI unit of magnetic induction is	A. Gauses B. Tesla C. Weber D. Weber²
6	The force experienced by charged particle is maximum, if it moves	A. parallel to magnetic field B. perpendicular to magnetic field C. opposite to the magnetic field D. none of these
7	Ammeter is used to measure	A. voltage B. resistance C. voltage and current D. current
8	In the region surrounding a current carrying wire:	A. A magnetic field is setup B. The lines of force are elliptical C. Direction of lines of forces depends upon direction of current D. Both (A) and (C)
9	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
10	(CRO) Cathode ray oscilloscope is a device used for high speed	A. velocity B. graph plotting C. time-velocity D. none of these

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ECAT Pre General Science Physics Chapter 14 MCQ Test With Answer

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

ECAT Pre General Science Physics Chapter 14 Electromagnetism