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

Question # 1

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 # 2

the current is pass through the straight wire. The magnetic field established around it has its lines of force:

Circular and endless
A
Oval in shape and endless
B
Straight
C
Parabolic
D
All are true E

Question # 3

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 # 4

For measuring large currents, an ordinary galvanometer cannot be used without proper, then both relates with each other as

modification A
voltage B
current C
resistance D

Question # 5

Total number of turns on 0.15 m length solenoid is 300. the value of n is:

Greater than 300 A
Smaller than 300 B
Equal to 300 C
Any of (A) or (B) D
Any of (A) or(C) E

Question # 6

The vector representation of force experience give the direction of

magnetic field A
current B
length of conductor C
force D

Question # 7

(CRO) Cathode ray oscilloscope is a device used for high speed

velocity A
graph plotting B
time-velocity C
none of these D

Question # 8

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

F = B² A
F = 0 B
F = B C
F = B/2 D

Question # 9

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 # 10

NmA^-1is commonly called:

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

Question # 11

CRO deflects the beam of

proton A
a-particle B
electron C
neutron D

Question # 12

The torque per unit twist of coil is called

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

Question # 13

A beam of electrons is provided by an

electron gun A
Suppray B
Injection C
None of these D

Question # 14

In a moving coil galvanometer, the deflecting couple depends upon

area of the coil A
number of turns of coil B
value of magnetic field C
all of the above D

Question # 15

The SI unit of magnetic flux is

NmA^-2 A
NmA^-1 B
NAm^-1 C
Nm²A^-1 D

Question # 16

A resistance used in galvanometer to make it voltmeter is called

shunt resistance A
high resistance B
zero resistance C
none of these D

Question # 17

Amperean path is a:

Closed path
A
Rectangular path
B
Circular path
C
Any of above
D
Broken path
E

Question # 18

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 # 19

The CRO is used for displaying the waveform of a given

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

Question # 20

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 # 21

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

loop A
circle B
bar magnet C
none of these D

Question # 22

Centripetal force for electron is given by

mv²/ r A
mv / r² B
mv²/ r C
mr²/ v D

Question # 23

If volume of wire is 'AL' and there are 'n' numbers of charge carriers per unit volume, then the total number of charge carriers are

n/AL A
Al/n B
nAL C
nA/L D

Question # 24

The unit of magnetic flux is

Weber-m² A
Weber-m³ B
Henry C
Weber D

Question # 25

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 # 26

It is customary represent a current flowing towards the reader by a symbol

(x) A
(+) B
(.) C
(-) D
(÷)
E

Question # 27

if the field is directed along the normal to the area, then flux is:

Maximum
A
Equal to zero
B
Equal to BA
C
Minimum
D
Both (A) and (C)
E

Question # 28

When the charged particle is projected at right angles to the field, then experienced by it will be:

Maximum A
Zero B
qvB C
Both (A) and (B) D
Both (A) and (C) E

Question # 29

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 # 30

Ammeter is used to measure

voltage A
resistance B
voltage and current C
current D

Sr.#	Question	Answer
1	The SI unit of magnetic flux is	A. NmA^-2 B. NmA^-1 C. NAm^-1 D. Nm²A^-1
2	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
3	The CRO is used for displaying the waveform of a given	A. current B. voltage C. both of them D. none of them
4	The unit of flux density is also given by	A. Weber/m²or Wb . m^-2 B. Weber/mor Wb . m C. Weber/mor Wb . m^-1 D. Weber or Wb
5	The unit of magnetic flux is	A. Weber-m² B. Weber-m³ C. Henry D. Weber
6	Magnetic lines of force:	A. Cannot intersect at all B. Intersect at infinity C. Intersect within magnet D. Intersect at Neutral Point
7	The CRO deflects the beam of electrons, when they passes through uniform	A. electric field B. gravitational field C. magnetic flax D. magnetic field
8	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
9	A full-scale deflection is obtained in a galvanometer with a current of few	A. ampere B. volts C. milliampere D. ohm
10	if the field is directed along the normal to the area, then flux is:	A. Maximum B. Equal to zero C. Equal to BA D. Minimum

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ECAT Pre General Science Physics Chapter 14 MCQ Test With Answer

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ECAT Pre General Science Physics Chapter 14 Electromagnetism