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

Question # 1

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

Question # 2

The most suitable material for permanent magnet is

cobalt A
iron B
steel C
alaminium D

Question # 3

The SI unit of flux density is

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

Question # 4

Avo-meter is used of measure the

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

Question # 5

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 # 6

The magnetic field outside the solenoid due to current is

strong A
zero B
weak C
uniform D

Question # 7

The sources of magnetic field are

isolated magnetic poles A
charges at rest B
charges in motion C
none of these D

Question # 8

Tesla is the unit of

Magnetic induction or flux density A
Magnetic flux B
Self inductance C
None of these D

Question # 9

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

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

Question # 10

Weber is a unit of

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

Question # 11

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 # 12

Hold the solenoid in the right hand with fingers curling in the direction of current. The direction of the field will be given by:

Thumb
A
Curled fingers
B
Middle finger
C
Arm of right hand
D
None of these
E

Question # 13

The vector representation of force experience give the direction of

magnetic field A
current B
length of conductor C
force 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

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 # 16

A solenoid is a coil of wire which is:

Short, loosely wound, cylindrical
A
Long, tightly wound, spherical
B
Long, loosely wound, cylindrical
C
Long, tightly wound, cylindrical
D
None of these
E

Question # 17

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 # 18

In order to make a voltmeter, high resistance is connected with galvanometer, in

perpendicular A
may be paralled or pendicular B
series C
none of these D

Question # 19

The SI unit of magnetic induction is tesla which is equal to

Newton/ampere-meter or N/A-m A
Newton/ampere²-meter or N/A²-m B
Newton/ampere²-meter² or N/A²-m² C
Newton/ampere²-meter²or N/A²-m² D

Question # 20

Which one of the following relations is correct?

1 Wb-m²= Nm^-1A^-1 A
1 tesla = 104 gausses B
1 Wb-m²= 1 tesla C
All of the above D

Question # 21

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 # 22

The SI unit of magnetic flux is.

weber A
Nm^-1A^-1 B
tesla C
gauss D

Question # 23

NmA^-1is commonly called:

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

Question # 24

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 # 25

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 # 26

The force experienced by a single charge carrier moving with velocity 'v' i magnetic field of strength 'B' is given by

F =q(v/B) A
F=q²(v x B) B
F=q(v x B) C
F= vx B D

Question # 27

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 # 28

F = I(L x B) is a

vector A
scalar B
unit vector C
none of these D

Question # 29

The SI unit of magnetic flux is

NmA^-2 A
NmA^-1 B
NAm^-1 C
Nm²A^-1 D

Question # 30

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

Sr.#	Question	Answer
1	A resistance used in galvanometer to make it voltmeter is called	A. shunt resistance B. high resistance C. zero resistance 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	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
4	The force acting on a charge moving in a magnetic field	A. is perpendicular to the both magnetic field and direction of motion B. is proportional to the magnetic of charges C. vanishes when the motion is directly opposite to the direction of field D. all of the above
5	When an electron enters in a magnetic field right angle to its motion, the magnitude of its velocity will be	A. changed B. zero C. unchanged D. none of these
6	Magnetic flux and flux density are related by	A. Flux density = flux x area B. Flux density = flux / area C. Flux density = flux - area D. None of these
7	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
8	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
9	How many number of anodes used in electron gun	A. one B. two C. three D. six
10	A galvanometer is an instrument used to	A. measure voltage across a circuit B. detect current in a circuit C. measure current flowing through a circuit 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