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

Question # 1

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 # 2

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 # 3

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

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

Question # 4

The sources of magnetic field are

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

Question # 5

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 # 6

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

circular A
elliptical B
cycloid C
straight line D

Question # 7

'K' is the proportionality constant of force experienced by conductor. What is the value of 'K' in SI units?

0 A
1 B
0.5 C
-1 D

Question # 8

A beam of electrons is provided by an

electron gun A
Suppray B
Injection C
None of these D

Question # 9

The SI unit of flux density is

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

Question # 10

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 # 11

The direction of lines of force depends upon the direction of

voltage A
current B
charges C
none of these D

Question # 12

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 # 13

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 # 14

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

ampere A
volts B
milliampere C
ohm D

Question # 15

Current is measured in

volts A
watt B
ohm C
ampere D

Question # 16

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 # 17

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 # 18

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

avometer A
millimeter B
voltmeter C
none of these D

Question # 19

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 # 20

The voltage increases linearly with

time A
velocity B
acceleration C
torque D

Question # 21

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 # 22

Method "lamp and scale arrangement" used to measure the

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

Question # 23

A long wire wound tightly on a cylindrical core is called:

Potentiometer A
Solenoid B
Toroid C
Wheat and stone bridge D
None of these E

Question # 24

The CRO is used for displaying the waveform of a given

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

Question # 25

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 # 26

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 # 27

Strength of magnetic field is measured in SI units, in:

N A
N/Am B
Am/N C
Nm/A D
None of these E

Question # 28

How many number of anodes used in electron gun

one A
two B
three C
six D

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 force exerted on a conductor of length L, carrying current I when placed in a magnetic field B is given by

F=IB/L A
F= L x B/I B
F = IL x B C
F = IL . B D

Sr.#	Question	Answer
1	The SI unit of flux density is.	A. Tesla B. Weber C. Gaun D. Weber/meter
2	A long wire wound tightly on a cylindrical core is called:	A. Potentiometer B. Solenoid C. Toroid D. Wheat and stone bridge
3	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
4	Galvanometer is a device used for the detection of	A. voltage B. current C. temperature D. pressure
5	CRO deflects the beam of	A. proton B. a-particle C. electron D. neutron
6	Electron gun consist of	A. three anodes B. heating cathode C. three anodes D. three anodes , heating cathode, grid
7	Which is modified form of galvanometer	A. potentiometer B. battery C. voltmeter D. slide wire bridge
8	In order to make a voltmeter, high resistance is connected with galvanometer, in	A. perpendicular B. may be paralled or pendicular C. series D. none of these
9	Method "lamp and scale arrangement" used to measure the	A. angle of deflection B. restoring torque C. magnetic field strength D. current
10	Strength of magnetic field is measured in SI units, in:	A. N B. N/Am C. Am/N D. Nm/A

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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