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

Question # 1

The field around a moving charge is called

magnetic field A
conservative field B
non-conservative field C
none of these D

Question # 2

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

ampere A
volts B
milliampere C
ohm D

Question # 3

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 # 4

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 # 5

Method "lamp and scale arrangement" used to measure the

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

Question # 6

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 # 7

A galvanometer in which the coil comes to rest quickly after the current passed through it, or the current stopped form flowing through it, is called

dead beat galvanometer A
stable galvanometer B
shunt galvanometer C
sensitive galvanomter D

Question # 8

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 # 9

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 # 10

The current sensitivity of the galvanometer is

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

Question # 11

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 # 12

magnetic field is a:

Vector quantity
A
Scalar quantity
B
Scalar as well as scalar quantity
C
Any of (A) or (B)
D
Neither (A) nor (B) E

Question # 13

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 # 14

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 # 15

How many number of anodes used in electron gun

one A
two B
three C
six D

Question # 16

A shunt resistance parallel to the galvanometer is used to convert it into

avometer A
millimeter B
voltmeter C
none of these D

Question # 17

The torque per unit twist of coil is called

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

Question # 18

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 # 19

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 # 20

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 # 21

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 # 22

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 # 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

A resistance used in voltmeter is called

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

Question # 25

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 # 26

For measuring large currents, an ordinary galvanometer cannot be used without proper, then both relates with each other as

modification A
voltage B
current C
resistance D

Question # 27

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 # 28

The voltage increases linearly with

time A
velocity B
acceleration C
torque D

Question # 29

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 # 30

The most suitable material for permanent magnet is

cobalt A
iron B
steel C
alaminium D

Sr.#	Question	Answer
1	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
2	Magnetic flux passing through the an element of are A placed perpendicular to a uniform magnetic field Bis:	A. Maximum B. Minimum C. Zero D. Very small
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:	A. -y direction B. +y direction C. +z direction D. -z direction
4	A shunt resistance parallel to the galvanometer is used to convert it into	A. avometer B. millimeter C. voltmeter D. none of these
5	The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon	A. Heating effect of current B. Chemical effect of current C. Magnetic effect of current D. Electromagnetic effect of current
6	A field is uniform and much stronger:	A. Inside a long solenoid B. Outside a long solenoid C. At the end of a long solenoid D. At the central point of long solenoid
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	Amperean path is a:	A. Closed path B. Rectangular path C. Circular path D. Any of above
9	A voltmeter is used to measure the	A. potential difference B. current C. temperature D. resistance
10	The pointer of a magnetic compass:	A. Is affected only by permanent magnets B. Align itself parallel to the applied magnetic field C. Vibrates in the magnetic field of the current D. Aligns itself perpendicular to the magnetic field

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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