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

Question # 1

The current sensitivity of the galvanometer is

C/BAN A
BAN/C B
CAN/B C
CBN/A D

Question # 2

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 # 3

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 # 4

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 # 5

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 # 6

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 # 7

'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 # 8

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 # 9

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 # 10

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 # 11

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 # 12

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

(x) A
(+) B
(.) C
(-) D
(÷)
E

Question # 13

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

ammeter A
voltmeter B
galvanometer C
avo-meter D

Question # 14

A resistance used in voltmeter is called

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

Question # 15

When some compass needles are placed on a card board along a circle with the center at the wire, they will

Point the direction of N-S
A
Set themselves tangential to the circle
B
Point in the direction of E-W
C
None of these
D
Point in direction of S-E E

Question # 16

Resistance is measured in

volts A
ampere B
ohm C
watt D

Question # 17

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 # 18

The SI unit of magnetic flux is.

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

Question # 19

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 # 20

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 # 21

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 # 22

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 # 23

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

circular A
elliptical B
cycloid C
straight line D

Question # 24

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 # 25

Flurescent screen is a screen where visible spot

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

Question # 26

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

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

Question # 27

The unit of magnetic flux is

Weber-m² A
Weber-m³ B
Henry C
Weber D

Question # 28

F = I(L x B) is a

vector A
scalar B
unit vector C
none of these D

Question # 29

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 # 30

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

Sr.#	Question	Answer
1	The strength of magnetic field around the current conductor is	A. Smaller near the conductor B. Greater near the conductor C. Greater at the large distance from the conductor D. Constant near and away from the conductor
2	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
3	A beam of electrons is provided by an	A. electron gun B. Suppray C. Injection D. None of these
4	The angle of deflection of coil can be measured by the	A. one method B. three method C. two method D. none of these
5	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
6	Flurescent screen is a screen where visible spot	A. vanishes B. is made C. becomes small and large D. none of these
7	The force experienced by charged particle is maximum, if it moves	A. parallel to magnetic field B. perpendicular to magnetic field C. opposite to the magnetic field D. none of these
8	The current sensitivity of the galvanometer is	A. C/BAN B. BAN/C C. CAN/B D. CBN/A
9	The most suitable material for permanent magnet is	A. cobalt B. iron C. steel D. alaminium
10	Charge to mass ratio (e/m) of an electron is given by the relation	A. e/m = 2V/Br² B. e/m = 2V/B²r C. e/m = 2V/B²r² D. e/m = V/2B²r²

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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