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

Question # 1

The unit of flux density is also given by

Weber/m²or Wb . m^-2 A
Weber/mor Wb . m B
Weber/mor Wb . m^-1 C
Weber or Wb D

Question # 2

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

Question # 3

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 # 4

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

ampere A
volts B
milliampere C
ohm D

Question # 5

NmA^-1is commonly called:

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

Question # 6

The pointer of a magnetic compass:

Is affected only by permanent magnets
A
Align itself parallel to the applied magnetic field
B
Vibrates in the magnetic field of the current
C
Aligns itself perpendicular to the magnetic field
D
Both (C) and (D) E

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 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 # 9

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 # 10

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 # 11

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 # 12

How many number of anodes used in electron gun

one A
two B
three C
six D

Question # 13

In a straight current carrying conductor, the direction of magnetic field can be found by

right hand rule A
left hand rule B
head to tall rule C
none of these D

Question # 14

Avo-meter is used of measure the

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

Question # 15

Centripetal force for electron is given by

mv²/ r A
mv / r² B
mv²/ r C
mr²/ v D

Question # 16

The torque per unit twist of coil is called

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

Question # 17

Tesla is the unit of

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

Question # 18

In the expression of force experienced by electron, the direction of both v and B are

parallel A
zero B
perpendicular C
none of them D

Question # 19

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

circular A
elliptical B
cycloid C
straight line D

Question # 20

A resistance used in voltmeter is called

shunt resistance A
high resistance B
low resistance C
zero resistance D

Question # 21

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 # 22

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 # 23

Method "lamp and scale arrangement" used to measure the

angle of deflection A
restoring torque B
magnetic field strength C
current D

Question # 24

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 # 25

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 # 26

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 # 27

Galvanometer is a device used for the detection of

voltage A
current B
temperature C
pressure D

Question # 28

The voltage increases linearly with

time A
velocity B
acceleration C
torque D

Question # 29

'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 # 30

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

Sr.#	Question	Answer
1	Centripetal force for electron is given by	A. mv²/ r B. mv / r² C. mv²/ r D. mr²/ v
2	NmA^-1is commonly called:	A. Weber B. Apmere C. Guass D. Coulomb
3	In the region surrounding a current carrying wire:	A. A magnetic field is setup B. The lines of force are elliptical C. Direction of lines of forces depends upon direction of current D. Both (A) and (C)
4	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
5	'K' is the proportionality constant of force experienced by conductor. What is the value of 'K' in SI units?	A. 0 B. 1 C. 0.5 D. -1
6	Total number of turns on 0.15 m length solenoid is 300. the value of n is:	A. Greater than 300 B. Smaller than 300 C. Equal to 300 D. Any of (A) or (B)
7	The unit of magnetic flux is	A. Weber-m² B. Weber-m³ C. Henry D. Weber
8	Current is measured in	A. volts B. watt C. ohm D. ampere
9	In the expression of force experienced by electron, the direction of both v and B are	A. parallel B. zero C. perpendicular D. none of them
10	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

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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

The unit of flux density is also given by

The force acting on a charge moving in a magnetic field

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

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

NmA-1 is commonly called:

The pointer of a magnetic compass:

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

The galvanometer can be made sensitive if the value of the factor C/BAN is

A resistance used in galvanometer to make it voltmeter is called

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:

In a moving coil galvanometer, the deflecting couple depends upon

How many number of anodes used in electron gun

In a straight current carrying conductor, the direction of magnetic field can be found by

Avo-meter is used of measure the

Centripetal force for electron is given by

The torque per unit twist of coil is called

Tesla is the unit of

In the expression of force experienced by electron, the direction of both v and B are

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

A resistance used in voltmeter is called

A magnetic force on an electron travelling with 108ms-1parallel to a field of strength 1 Wb m-2is

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

Method "lamp and scale arrangement" used to measure the

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

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

Magnetic induction is also called as:

Galvanometer is a device used for the detection of

The voltage increases linearly with

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

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

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NmA^-1is commonly called:

A magnetic force on an electron travelling with 10⁸ms^-1parallel to a field of strength 1 Wb m^-2is

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