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

Question # 1

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 # 2

The permeability of free space is measured in:

Wb/Am A
Wb A/m B
Am/Wb C
m/Web A D
None of these E

Question # 3

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 # 4

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

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

Question # 5

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 # 6

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

Question # 7

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 # 8

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 # 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

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

loop A
circle B
bar magnet C
none of these D

Question # 11

A field is uniform and much stronger:

Inside a long solenoid
A
Outside a long solenoid
B
At the end of a long solenoid
C
At the central point of long solenoid
D
None of these
E

Question # 12

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 # 13

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 # 14

Ammeter is used to measure

voltage A
resistance B
voltage and current C
current D

Question # 15

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 # 16

The SI unit of flux density is

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

Question # 17

the current is pass through the straight wire. The magnetic field established around it has its lines of force:

Circular and endless
A
Oval in shape and endless
B
Straight
C
Parabolic
D
All are true E

Question # 18

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 # 19

A current carrying conductor is placed at right angle to the magnetic field. The magnetic force experienced by the conductor is

minimum A
maximum B
zero C
none of these D

Question # 20

The SI unit of magnetic induction is tesla which is equal to

Newton/ampere-meter or N/A-m A
Newton/ampere²-meter or N/A²-m B
Newton/ampere²-meter² or N/A²-m² C
Newton/ampere²-meter²or N/A²-m² D

Question # 21

A voltmeter is used to measure the

potential difference A
current B
temperature C
resistance D

Question # 22

When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into

Voltmeter A
Avometer B
Ammeter C
None of these D

Question # 23

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 # 24

The direction of lines of force depends upon the direction of

voltage A
current B
charges C
none of these D

Question # 25

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 # 26

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 # 27

The field around a moving charge is called

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

Question # 28

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 # 29

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 # 30

CRO deflects the beam of

proton A
a-particle B
electron C
neutron D

Sr.#	Question	Answer
1	NmA^-1is commonly called:	A. Weber B. Apmere C. Guass D. Coulomb
2	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)
3	Galvanometer is a device used for the detection of	A. voltage B. current C. temperature D. pressure
4	The vector representation of force experience give the direction of	A. magnetic field B. current C. length of conductor D. force
5	A resistance used in galvanometer to make it voltmeter is called	A. shunt resistance B. high resistance C. zero resistance D. none of these
6	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
7	When some compass needles are placed on a card board along a circle with the center at the wire, they will	A. Point the direction of N-S B. Set themselves tangential to the circle C. Point in the direction of E-W D. None of these
8	The unit of flux density is also given by	A. Weber/m²or Wb . m^-2 B. Weber/mor Wb . m C. Weber/mor Wb . m^-1 D. Weber or Wb
9	The most suitable material for permanent magnet is	A. cobalt B. iron C. steel D. alaminium
10	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

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