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

Question # 1

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 # 2

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 # 3

The most suitable material for permanent magnet is

cobalt A
iron B
steel C
alaminium D

Question # 4

Ammeter is used to measure

voltage A
resistance B
voltage and current C
current D

Question # 5

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 # 6

The voltage increases linearly with

time A
velocity B
acceleration C
torque D

Question # 7

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

loop A
circle B
bar magnet C
none of these D

Question # 8

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 # 9

'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 # 10

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

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

Question # 11

A beam of electrons is provided by an

electron gun A
Suppray B
Injection C
None of these D

Question # 12

Flurescent screen is a screen where visible spot

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

Question # 13

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 # 14

To convert galvanometer into ammeter we connect

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

Question # 15

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 # 16

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 # 17

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 # 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

Weber is a unit of

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

Question # 20

The current is measured in

volts A
watt B
ampere C
ohm D

Question # 21

The magnetic field outside the solenoid due to current is

strong A
zero B
weak C
uniform D

Question # 22

CRO deflects the beam of

proton A
a-particle B
electron C
neutron D

Question # 23

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 # 24

When an electron enters in a magnetic field right angle to its motion, the magnitude of its velocity will be

changed A
zero B
unchanged C
none of these 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

The CRO is used for displaying the waveform of a given

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

Question # 27

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 # 28

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

ampere A
volts B
milliampere C
ohm D

Question # 29

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

BACosѲ
A
Zero B
BA C
BA sinѲ D
None of these E

Question # 30

The vector representation of force experience give the direction of

magnetic field A
current B
length of conductor C
force D

Sr.#	Question	Answer
1	The direction of lines of force depends upon the direction of	A. voltage B. current C. charges D. none of these
2	the current is pass through the straight wire. The magnetic field established around it has its lines of force:	A. Circular and endless B. Oval in shape and endless C. Straight D. Parabolic
3	A voltmeter is used to measure the	A. potential difference B. current C. temperature D. resistance
4	When charged particle is projected perpendicular to a uniform magnetic field its trajectory is	A. circular B. elliptical C. cycloid D. straight line
5	The most suitable material for permanent magnet is	A. cobalt B. iron C. steel D. alaminium
6	The magnetic force exerted on an electron moving with velocity 'v' at right angle to the magnetic field is given by	A. F=eVB B. F=e²V/B C. F=e/VB D. F=B²/ev
7	The voltage increases linearly with	A. time B. velocity C. acceleration D. torque
8	A shunt resistance parallel to the galvanometer is used to convert it into	A. avometer B. millimeter C. voltmeter D. none of these
9	A resistance used in voltmeter is called	A. shunt resistance B. high resistance C. low resistance D. zero resistance
10	The SI unit of magnetic flux is.	A. weber B. Nm^-1A^-1 C. tesla D. gauss

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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