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

Question # 1

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 # 2

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 # 3

A voltmeter is used to measure the

potential difference A
current B
temperature C
resistance D

Question # 4

Magnetic flux passing through a element whose vector area makes an angle0º with lines of magnetic force is:

BACosѲ
A
Zero B
BA C
BA sinѲ D
None of these E

Question # 5

The force experienced by an electron projected in a magnetic field B with a velocity V is given by

F=e(V x B) A
F= -e(V x B) B
F= e(B x V) C
Both a and c D

Question # 6

The torque per unit twist of coil is called

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

Question # 7

The sources of magnetic field are

isolated magnetic poles A
charges at rest B
charges in motion C
none of these D

Question # 8

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 # 9

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 # 10

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

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

Question # 11

Avo-meter is used of measure the

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

Question # 12

The voltage increases linearly with

time A
velocity B
acceleration C
torque D

Question # 13

The magnetic field outside the solenoid due to current is

strong A
zero B
weak C
uniform D

Question # 14

Method "lamp and scale arrangement" used to measure the

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

Question # 15

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 # 16

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 # 17

If the value of galvanometer constant k = C/BAN is made small, the galvanometer can be made

Sensitive A
Accurate B
Stable C
None of these D

Question # 18

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 # 19

Amperean path is a:

Closed path
A
Rectangular path
B
Circular path
C
Any of above
D
Broken path
E

Question # 20

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 # 21

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 # 22

The straight current carrying conductor experiences maximum force in a uniform magnetic field when it is placed

parallel to the field A
Perpendicular to the field B
At an angle of 45 to the field C
None of the above D

Question # 23

Flurescent screen is a screen where visible spot

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

Question # 24

Tesla is the unit of

Magnetic induction or flux density A
Magnetic flux B
Self inductance C
None of these D

Question # 25

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 # 26

NmA^-1is commonly called:

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

Question # 27

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 # 28

The CRO is used for displaying the waveform of a given

current A
voltage B
both of them C
none of them D

Question # 29

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 # 30

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

Sr.#	Question	Answer
1	The magnetic field in the middle of a solenoid due to current is	A. weak B. strong and uniform C. none-uniform D. zero
2	When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into	A. Voltmeter B. Avometer C. Ammeter D. None of these
3	A full-scale deflection is obtained in a galvanometer with a current of few	A. ampere B. volts C. milliampere D. ohm
4	Method "lamp and scale arrangement" used to measure the	A. angle of deflection B. restoring torque C. magnetic field strength D. current
5	The force exerted on a conductor of length L, carrying current I when placed in a magnetic field B is given by	A. F=IB/L B. F= L x B/I C. F = IL x B D. F = IL . B
6	In a moving coil galvanometer, the deflecting couple depends upon	A. area of the coil B. number of turns of coil C. value of magnetic field D. all of the above
7	Electron gun consist of	A. three anodes B. heating cathode C. three anodes D. three anodes , heating cathode, grid
8	Resistance is measured in	A. volts B. ampere C. ohm D. watt
9	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	A. F = B² B. F = 0 C. F = B D. F = B/2
10	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)

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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