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

Question # 1

The current sensitivity of the galvanometer is

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

Question # 2

The voltage increases linearly with

time A
velocity B
acceleration C
torque D

Question # 3

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 # 4

Resistance is measured in

volts A
ampere B
ohm C
watt D

Question # 5

A voltmeter is used to measure the

potential difference A
current B
temperature C
resistance D

Question # 6

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 # 7

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 # 8

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 # 9

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

loop A
circle B
bar magnet C
none of these D

Question # 10

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

ammeter A
voltmeter B
galvanometer C
avo-meter D

Question # 11

A beam of electrons is provided by an

electron gun A
Suppray B
Injection C
None of these D

Question # 12

Galvanometer is a device used for the detection of

voltage A
current B
temperature C
pressure D

Question # 13

Flurescent screen is a screen where visible spot

vanishes A
is made B
becomes small and large C
none of these D

Question # 14

The most suitable material for permanent magnet is

cobalt A
iron B
steel C
alaminium D

Question # 15

The SI unit of flux density is.

Tesla A
Weber B
Gaun C
Weber/meter D

Question # 16

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 # 17

NmA^-1is commonly called:

Weber A
Apmere B
Guass C
Coulomb D
None of these E

Question # 18

The CRO deflects the beam of electrons, when they passes through uniform

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

Question # 19

Magnetic lines of force:

Cannot intersect at all
A
Intersect at infinity
B
Intersect within magnet
C
Intersect at Neutral Point
D
None of these E

Question # 20

The SI unit of flux density is

Newton/Amp-meter A
Newton-m/Ampere B
Newton-m/Amp² C
Newton-Amp/meter D

Question # 21

The torque per unit twist of coil is called

proportionality constant A
gravitational constant B
boltzman constant C
coupling constant D

Question # 22

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

Total number of turns of solenoid
A
Number of turns per unit length
B
Number of turns per unit volume
C
Numbers of turns per unit area
D
Number of moles
E

Question # 23

A meter wire carraying a current of 2A is at right angle to the uniform magnetic field of 0.5 Weber/m²The force on the wire is

5N A
4N B
1.5N C
6N D

Question # 24

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

V/Br A
V/B²r² B
V²/Br² C
V²/Br D

Question # 25

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

circular A
elliptical B
cycloid C
straight line D

Question # 26

Avo-meter is used of measure the

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

Question # 27

A field is uniform and much stronger:

Inside a long solenoid
A
Outside a long solenoid
B
At the end of a long solenoid
C
At the central point of long solenoid
D
None of these
E

Question # 28

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 # 29

A galvanometer in which the coil comes to rest quickly after the current passed through it, or the current stopped form flowing through it, is called

dead beat galvanometer A
stable galvanometer B
shunt galvanometer C
sensitive galvanomter D

Question # 30

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

Sr.#	Question	Answer
1	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
2	In order to make a voltmeter, high resistance is connected with galvanometer, in	A. perpendicular B. may be paralled or pendicular C. series D. none of these
3	The total number of lines of magnetic induction pasing through a surface perpendicular to the magnetic field is called	A. magnetic flux B. magnetic flux density C. magnetic induction D. magnetic field intensity
4	Galvanometer is a device used for the detection of	A. voltage B. current C. temperature D. pressure
5	In a moving coil galvanometer, the deflecting couple depends upon	A. area of the coil B. number of turns of coil C. value of magnetic field D. all of the above
6	Hold the solenoid in the right hand with fingers curling in the direction of current. The direction of the field will be given by:	A. Thumb B. Curled fingers C. Middle finger D. Arm of right hand
7	When charged particle is projected perpendicular to a uniform magnetic field its trajectory is	A. circular B. elliptical C. cycloid D. straight line
8	F = I(L x B) is a	A. vector B. scalar C. unit vector D. none of these
9	When current passes through a solenoid coil, it behaves like a	A. loop B. circle C. bar magnet D. none of these
10	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

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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