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

Question # 1

Weber is a unit of

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

Question # 2

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 # 3

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 # 4

The SI unit of flux density is

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

Question # 5

The voltage increases linearly with

time A
velocity B
acceleration C
torque D

Question # 6

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 # 7

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 # 8

The force acting as one meter length of the conductor placed at right angle to the magnetic field, when one A current is passing through it, defines the

magnetic flux A
magnetic induction B
magnetic field C
self inductance D

Question # 9

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 # 10

The torque per unit twist of coil is called

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

Question # 11

The strength of magnetic field around the current conductor is

Smaller near the conductor A
Greater near the conductor B
Greater at the large distance from the conductor C
Constant near and away from the conductor D

Question # 12

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 # 13

A resistance used in voltmeter is called

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

Question # 14

The force experienced by charged particle is maximum, if it moves

parallel to magnetic field A
perpendicular to magnetic field B
opposite to the magnetic field C
none of these D

Question # 15

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 # 16

The SI unit of magnetic induction is

Gauses A
Tesla B
Weber C
Weber² D

Question # 17

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 # 18

Galvanometer is a device used for the detection of

voltage A
current B
temperature C
pressure D

Question # 19

The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon

Heating effect of current A
Chemical effect of current B
Magnetic effect of current C
Electromagnetic effect of current D

Question # 20

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 # 21

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

circular A
elliptical B
cycloid C
straight line D

Question # 22

The magnetic force exerted on an electron moving with velocity 'v' at right angle to the magnetic field is given by

F=eVB A
F=e²V/B B
F=e/VB C
F=B²/ev D

Question # 23

The magnetic field outside the solenoid due to current is

strong A
zero B
weak C
uniform D

Question # 24

if the field is directed along the normal to the area, then flux is:

Maximum
A
Equal to zero
B
Equal to BA
C
Minimum
D
Both (A) and (C)
E

Question # 25

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 # 26

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 # 27

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

ampere A
volts B
milliampere C
ohm D

Question # 28

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

(x) A
(+) B
(.) C
(-) D
(÷)
E

Question # 29

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

loop A
circle B
bar magnet C
none of these D

Question # 30

The direction of lines of force depends upon the direction of

voltage A
current B
charges C
none of these D

Sr.#	Question	Answer
1	41 The force experience, when proton projected in a magnetic field with velocity 'v' is	A. +e(v x B) B. -C(V x B) C. +e²(v x B) D. -e(v²x B)
2	Galvanometer is a device used for the detection of	A. voltage B. current C. temperature D. pressure
3	How many number of anodes used in electron gun	A. one B. two C. three D. six
4	If the value of galvanometer constant k = C/BAN is made small, the galvanometer can be made	A. Sensitive B. Accurate C. Stable D. None of these
5	Gauss(G) is smaller unit of magnetic induction which is related to tesla(T) as	A. IT = 10^-4G B. IT = 10⁵G C. IT = 10³G D. IT = 10⁴G
6	if the field is directed along the normal to the area, then flux is:	A. Maximum B. Equal to zero C. Equal to BA D. Minimum
7	When the charged particle is projected at right angles to the field, then experienced by it will be:	A. Maximum B. Zero C. qvB D. Both (A) and (B)
8	The most suitable material for permanent magnet is	A. cobalt B. iron C. steel D. alaminium
9	The force acting as one meter length of the conductor placed at right angle to the magnetic field, when one A current is passing through it, defines the	A. magnetic flux B. magnetic induction C. magnetic field D. self inductance
10	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

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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