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

Question # 1

'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 # 2

Method "lamp and scale arrangement" used to measure the

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

Question # 3

In the region surrounding a current carrying wire:

A magnetic field is setup
A
The lines of force are elliptical
B
Direction of lines of forces depends upon direction of current
C
Both (A) and (C)
D
All of these E

Question # 4

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 # 5

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 # 6

The SI unit of flux density is.

Tesla A
Weber B
Gaun C
Weber/meter D

Question # 7

Avo-meter is used of measure the

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

Question # 8

The most suitable material for permanent magnet is

cobalt A
iron B
steel C
alaminium D

Question # 9

The force exerted on a conductor of length L, carrying current I when placed in a magnetic field B is given by

F=IB/L A
F= L x B/I B
F = IL x B C
F = IL . B D

Question # 10

If the number of turns of a solenoid (carrying a steady current I) is doubled without changing the length of a solenoid, then magnetic field:

Becomes Half A
Becomes double B
Is not affected C
Becomes one fourth D
None of these E

Question # 11

The voltage increases linearly with

time A
velocity B
acceleration C
torque D

Question # 12

The SI unit of magnetic flux is

NmA^-2 A
NmA^-1 B
NAm^-1 C
Nm²A^-1 D

Question # 13

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 # 14

The direction of lines of force depends upon the direction of

voltage A
current B
charges C
none of these D

Question # 15

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 # 16

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 # 17

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 # 18

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 # 19

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 # 20

NmA^-1is commonly called:

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

Question # 21

Magnetic lines of force:

Cannot intersect at all
A
Intersect at infinity
B
Intersect within magnet
C
Intersect at Neutral Point
D
None of these E

Question # 22

When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is

90° A
75° B
0° C
180° D

Question # 23

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 # 24

A voltmeter is used to measure the

potential difference A
current B
temperature C
resistance D

Question # 25

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 # 26

The magnetic field inside a solenoid can be increased by:

Increasing n A
Decreasing I B
Increasing I C
By using iron core within solenoid D
All correct except (B) E

Question # 27

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 # 28

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 # 29

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 # 30

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

Sr.#	Question	Answer
1	The SI unit of magnetic flux is	A. NmA^-2 B. NmA^-1 C. NAm^-1 D. Nm²A^-1
2	Which one of the following relations is correct?	A. 1 Wb-m²= Nm^-1A^-1 B. 1 tesla = 104 gausses C. 1 Wb-m²= 1 tesla D. All of the above
3	The galvanometer can be made sensitive if the value of the factor C/BAN is	A. constant B. small C. large D. none of these
4	Electron gun consist of	A. three anodes B. heating cathode C. three anodes D. three anodes , heating cathode, grid
5	The voltage increases linearly with	A. time B. velocity C. acceleration D. torque
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 vector representation of force experience give the direction of	A. magnetic field B. current C. length of conductor D. force
8	The current is measured in	A. volts B. watt C. ampere D. ohm
9	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	A. 5N B. 4N C. 1.5N D. 6N
10	The SI unit of flux density is.	A. Tesla B. Weber C. Gaun D. Weber/meter

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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

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

Method "lamp and scale arrangement" used to measure the

In the region surrounding a current carrying wire:

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

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

The SI unit of flux density is.

Avo-meter is used of measure the

The most suitable material for permanent magnet is

The force exerted on a conductor of length L, carrying current I when placed in a magnetic field B is given by

If the number of turns of a solenoid (carrying a steady current I) is doubled without changing the length of a solenoid, then magnetic field:

The voltage increases linearly with

The SI unit of magnetic flux is

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

The direction of lines of force depends upon the direction of

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

The SI unit of magnetic permeability is

Which one of the following relations is correct?

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

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

NmA-1 is commonly called:

Magnetic lines of force:

When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is

Lorentz force is defined as

A voltmeter is used to measure the

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

The magnetic field inside a solenoid can be increased by:

The pointer of a magnetic compass:

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

The e/m of an electron moving in a circular path in a magnetic field is equal to

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

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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

NmA^-1is commonly called:

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