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

Question # 1

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 # 2

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

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

Question # 3

A long wire wound tightly on a cylindrical core is called:

Potentiometer A
Solenoid B
Toroid C
Wheat and stone bridge D
None of these E

Question # 4

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:

-y direction A
+y direction B
+z direction C
-z direction D
None of these E

Question # 5

A full-scale deflection is obtained in a galvanometer with a current of few

ampere A
volts B
milliampere C
ohm D

Question # 6

Ammeter is used to measure

voltage A
resistance B
voltage and current C
current D

Question # 7

The SI unit of magnetic induction is

Gauses A
Tesla B
Weber C
Weber² D

Question # 8

F = I(L x B) is a

vector A
scalar B
unit vector C
none of these D

Question # 9

Magnetic induction is also called as:

Ampere’s law
A
Faraday’s law
B
Lenz’s law
C
Newton’s law
D
Coulomb’s law
E

Question # 10

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

e/m = 2V/Br² A
e/m = 2V/B²r B
e/m = 2V/B²r² C
e/m = V/2B²r² D

Question # 11

The most suitable material for permanent magnet is

cobalt A
iron B
steel C
alaminium D

Question # 12

A charged particle moving at right angle to the magnetic field will experience

minimum force A
maximum force B
zero C
moderate force D

Question # 13

Which is modified form of galvanometer

potentiometer A
battery B
voltmeter C
slide wire bridge D

Question # 14

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 # 15

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

N A
N/Am B
Am/N C
Nm/A D
None of these E

Question # 16

Electron gun consist of

three anodes A
heating cathode B
three anodes C
three anodes , heating cathode, grid D

Question # 17

41 The force experience, when proton projected in a magnetic field with velocity 'v' is

+e(v x B) A
-C(V x B) B
+e²(v x B) C
-e(v²x B) D

Question # 18

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 # 19

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

avometer A
millimeter B
voltmeter C
none of these D

Question # 20

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 # 21

How many number of anodes used in electron gun

one A
two B
three C
six D

Question # 22

'K' is the proportionality constant of force experienced by conductor. What is the value of 'K' in SI units?

0 A
1 B
0.5 C
-1 D

Question # 23

For the conversion of galvanometer into voltmeter, we connect a

small resistance in series with galvanometer A
small resistance in parallel with galvanometer B
high resistance in parallel with galvanometer C
high resistance series with galvanometer D

Question # 24

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 # 25

The SI unit of magnetic permeability is

WB A^-1m^-1 A
WB mA^-1 B
WB Am^-1 C
None of these D

Question # 26

Galvanometer is a device used for the detection of

voltage A
current B
temperature C
pressure D

Question # 27

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

Maximum A
Minimum B
Zero C
Very small D
None of these E

Question # 28

The unit of magnetic flux is

Weber-m² A
Weber-m³ B
Henry C
Weber D

Question # 29

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

loop A
circle B
bar magnet C
none of these D

Question # 30

The straight current carrying conductor experiences maximum force in a uniform magnetic field when it is placed

parallel to the field A
Perpendicular to the field B
At an angle of 45 to the field C
None of the above D

Sr.#	Question	Answer
1	How many number of anodes used in electron gun	A. one B. two C. three D. six
2	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
3	Galvanometer is a device used for the detection of	A. voltage B. current C. temperature D. pressure
4	The voltage increases linearly with	A. time B. velocity C. acceleration D. torque
5	Magnetic induction is also called as:	A. Ampere’s law B. Faraday’s law C. Lenz’s law D. Newton’s law
6	A solenoid is a coil of wire which is:	A. Short, loosely wound, cylindrical B. Long, tightly wound, spherical C. Long, loosely wound, cylindrical D. Long, tightly wound, cylindrical
7	Magnetic flux passing through the an element of are A placed perpendicular to a uniform magnetic field Bis:	A. Maximum B. Minimum C. Zero D. Very small
8	The SI unit of magnetic flux is	A. NmA^-2 B. NmA^-1 C. NAm^-1 D. Nm²A^-1
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	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

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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