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

Question # 1

Galvanometer is a device used for the detection of

voltage A
current B
temperature C
pressure D

Question # 2

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 # 3

Magnetic flux and flux density are related by

Flux density = flux x area A
Flux density = flux / area B
Flux density = flux - area C
None of these D

Question # 4

How many number of anodes used in electron gun

one A
two B
three C
six D

Question # 5

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

loop A
circle B
bar magnet C
none of these D

Question # 6

The SI unit of magnetic flux is.

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

Question # 7

The field around a moving charge is called

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

Question # 8

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 # 9

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 # 10

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 # 11

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 # 12

The e/m of an electron moving in a circular path in a magnetic field is equal to

V/Br A
V/B²r² B
V²/Br² C
V²/Br D

Question # 13

The SI unit of flux density is

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

Question # 14

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 # 15

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 # 16

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 # 17

The torque per unit twist of coil is called

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

Question # 18

Gauss(G) is smaller unit of magnetic induction which is related to tesla(T) as

IT = 10^-4G A
IT = 10⁵G B
IT = 10³G C
IT = 10⁴G D

Question # 19

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

avometer A
millimeter B
voltmeter C
none of these D

Question # 20

A meter wire carraying a current of 2A is at right angle to the uniform magnetic field of 0.5 Weber/m²The force on the wire is

5N A
4N B
1.5N C
6N D

Question # 21

Which is modified form of galvanometer

potentiometer A
battery B
voltmeter C
slide wire bridge D

Question # 22

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 # 23

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 # 24

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 # 25

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 # 26

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 # 27

Ammeter is used to measure

voltage A
resistance B
voltage and current C
current D

Question # 28

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 # 29

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 # 30

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

Sr.#	Question	Answer
1	The SI unit of flux density is	A. Newton/Amp-meter B. Newton-m/Ampere C. Newton-m/Amp² D. Newton-Amp/meter
2	The most suitable material for permanent magnet is	A. cobalt B. iron C. steel D. alaminium
3	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
4	A current carrying conductor sets up its own:	A. Electric field B. Nuclear field C. Magnetic field D. Both (A) and (C)
5	The current is measured in	A. volts B. watt C. ampere D. ohm
6	NmA^-1is commonly called:	A. Weber B. Apmere C. Guass D. Coulomb
7	How many number of anodes used in electron gun	A. one B. two C. three D. six
8	The field around a moving charge is called	A. magnetic field B. conservative field C. non-conservative field D. none of these
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	Which is modified form of galvanometer	A. potentiometer B. battery C. voltmeter D. slide wire bridge

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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