GRADE 12 - PHYSICS CHAPTER NO.3 ELECTROMAGNETISM Test No.2 Online MCQs MDCAT, UHS, PMC & ECAT Preparation

GRADE 12 – PHYSICS CHAPTER NO.3 ELECTROMAGNETISM Test No.2 Online MCQs MDCAT, UHS, PMC & ECAT Preparation

PHYSICS – 2nd Year
Chapter Name : ELECTROMAGNETISM
Chapter No. 3 / 14 [ Test No.2 ]
Multiple Choice Questions
Note : All MCQ’s selected in this test are from OLD F.Sc. board , UHS and PMC(Pakistan Medical Commission) Islamabad Papers.

Book Name : PHYSICS
Chapter No. 3 / 14 (Test No. 2)
Chapter Name : ELECTROMAGNETISM
Total MCQ from Text Book : 95
Book Version : 2020
Published By : Punjab Text Book Board Lahore
Approved By : Govt of the Punjab and Federal Ministry for Education
Test Type : MCQ’s
Exam conduct By : Inter Boards of Sindh, KPK, Balochistan, AJK, Gilgit Baltistan, Punjab & Federal
Class / Grade : 12 ( F.Sc. Intermediate)
Total Marks : 95
Total Time : 47 minutes 30 Seconds

GRADE 12 - PHYSICS CHAPTER NO.3 ELECTROMAGNETISM Test No. 2

Please wait while the activity loads.
If this activity does not load, try refreshing your browser. Also, this page requires javascript. Please visit using a browser with javascript enabled.

If loading fails, click here to try again

GRADE 12 - PHYSICS CHAPTER NO.3 ELECTROMAGNETISM Test No. 2

Start

Congratulations - you have completed GRADE 12 - PHYSICS CHAPTER NO.3 ELECTROMAGNETISM Test No. 2. You scored %%SCORE%% out of %%TOTAL%%. Your performance has been rated as %%RATING%%

Your answers are highlighted below.

Question 1

Energy stored per unit volume inside a solenoid is called

A	Energy density
B	Electric flux
C	Volume Charge density
D	Work

Question 2

When a charge is projected perpendicular to a uniform magnetic field, its path is

A	Circular
B	Helix
C	Spiral
D	Ellipse

Question 3

Force on a charged particle is zero when projected at angle with the magnetic field

A	180°
B	0°
C	90°
D	270°

Question 4

The number of electrons on CRO is controlled by

A	X deflecting plates
B	Filament
C	Y deflecting plates
D	Grid

Question 5

1 tesla is equal to

A	1Nm^-7 A^-7
B	1Nm^-7
C	1NmA^-1
D	1Nm^-2A^-1

Question 6

Proton and a - particle moving with same velocity enter a magnetic field perpendicularly. Which of the following is the ratio of radius of proton to a - particle

A	2-Jan
B	1
C	4
D	2

Question 7

Which is the correct relation

A	IT = 10⁴G
B	IT = 10^-2G
C	IT = 10^-4G
D	IT = 10²G

Question 8

An electron is moving in -a circle of radius r in a uniform magnetic field B. Suddenly the field is reduced to The radius of circle now becomes

A	r/4
B	4r
C	2r
D	r/2

Question 9

The brightness of the spot on CRO screen is controlled by

A	Anode
B	Grid
C	Plates
D	Cathode

Question 10

Lorentz force is given by

A	q(E^?+V^? x B^?)
B	q[E^?×(V^?+B^?)]
C	q(E^?-V^? x B^?)
D	q(V^?+E^? x B^?)

Question 11

In order to increase sensitivity galvanometer the value of C may by

A	Remains same
B	Decrease
C	Neither increase nor decrease
D	Increase

Question 12

1 Tesla =

A	N^-1Am
B	1NA^-1m^-1
C	1 N^-1Am^-1
D	1N^-1Am^-2

Question 13

The effective way to increase the sensitivity of moving coil galvanometer is

A	Increase the magnetic field
B	Increase the area of Coil
C	Increase the number of Turns
D	Increase the value of constant

Question 14

In order to increase the range of voltmeter, the series resistance is

A	Decreased
B	Kept constant
C	Increased
D	Sometimes increased and sometimes decreased

Question 15

The SI unit of magnetic induction is

A	Newton
B	Weber
C	Tesla
D	Gauss

Question 16

The resistance of an ideal ammeter

A	Infinite
B	High
C	Small
D	Zero

Question 17

The unit of magnetic flux is

A	Tesla
B	Weber m^-2
C	Tesla²
D	Weber

Question 18

Which of the following in motion can not be deflected by magnetic field?

A	Sodium ion
B	Electron
C	Proton
D	Neutron

Question 19

Magnetic effect of current was discovered by

A	Kirchhoff
B	Joule
C	Faraday
D	Oersted

Question 20

A current carrying loop is placed in a uniform magnetic field. The torque acting on it, does not depend upon

A	Shape of loop
B	Area of loop
C	Current of the loop
D	Magnetic field

Question 21

The SI unit of electric flux is:

A	N mC²
B	N mC^-2
C	NC m^-2
D	Nm^-2C^-2

Question 22

In case of conversion of galvanometer into ammeter the shunt resistance is connected

A	Neither parallel nor series
B	In series
C	In parallel
D	In parallel and In series

Question 23

A charged particle enters at 30^° to the magnetic field Its path becomes

A	Elliptical
B	Helical
C	Circular
D	Straight line

Question 24

The brightness of spot in CRO is controlled by

A	Grid
B	Anode
C	Deflecting plates
D	Cathode

Question 25

A power line lies along east-west direction and carries a current of 10A. Which of the following is the force Per meter due to earth's magnetic-field of 10^-4 tesla?

A	10 ² N
B	10 ⁴N
C	10 ³N
D	10 ⁵N

Question 26

An electron and a proton enter a magnetic field with same velocity. Which of the following is the ratio of the acceleration

A	√m_p / m_e
B	m_e / m_p
C	(√m_e / m_p
D	m_p / m_e

Question 27

A magnet drops down a long vertical copper tube. As it falls down the tube its velocity

A	Increase
B	Decrease
C	Remain constant
D	None of above

Question 28

A charged particle moves through a magnetic field in a direction perpendicular to it. Which of the following remain unchanged for the partical

A	Velocity
B	Direction
C	Speed
D	Acceleration

Question 29

If a high resistance is connected in series to a galvanometer, then galvanometer is converted into

A	Ammeter
B	Voltmeter
C	Multimeter
D	Ohmmeter

Question 30

An avometer can also be called as

A	Digital multimeter
B	Digital voltmeter
C	Digital ohm-meter
D	Digital ammeter

Question 31

The charges moving perpendicular to magnetic field experience force

A	Minimum
B	Infinite
C	Zero
D	Maximum

Question 32

AVOmeter basically consists of

A	Moving coil galvanometer
B	Voltmeter
C	Ohmmeter
D	Ammeter

Question 33

A proper combination of a galvanometer and a series of resistance acts as

A	Voltmeter
B	Ohmmeter
C	Ammeter
D	Digital Multimeter

Question 34

If the number of turns become double but length remain same, then magnetic field in the solenoid become:

A	Double
B	Remain same
C	Zero
D	Half

Question 35

One Tesla is equal to

A	ANm^-1
B	N^-1Am
C	NA^-1m
D	NA^-1m^-1

Question 36

The relation between current I and angle of deflection ? in a moving coil galvanometer is

A	I∝sinΘ
B	I∝(I/Θ)
C	I∝cosΘ
D	I∝Θ

Question 37

The value of e/m is smallest for

A	B-particals
B	Positrons
C	Proton
D	Electron

Question 38

The S.I unit of magnetic flux is given by

A	Nm^-1 A
B	Nm² A^-1
C	NmA^-1
D	Nm^-7 A^-7

Question 39

A voltmeter is always connected in

A	Parallel
B	Series
C	Straight line
D	Perpendicular

Question 40

Two parallel wire carrying current in the same direction attract each other because of

A	Potential difference between them
B	Mutual inductance between them
C	Electric force between them
D	Magnetic force between them

Question 41

A charged particle moves along a circle under the action of possible electric and magnetic fields. Which of the following is possible

A	E≠0 B≠0
B	E≠0 B = 0
C	E = 0, B≠
D	E = 0 B = 0

Question 42

Voltmeter of range IV has a resistance of 1000?. To extend the range to 10V the additional series required is

A	10000Ω
B	9000Ω
C	11000Ω
D	1000Ω

Question 43

Shunted galvanometer is called

A	Potentiometer
B	Voltmeter
C	Ohm meter
D	Ammeter

Question 44

A uniform magnetic field is represented by a set of lines of force which are

A	None of these
B	Divergent
C	Parallel
D	Convergent

Question 45

The radius of curvature of the path of charged particle in a uniform magnetic field is directly proportional the

A	Momentum of particle
B	Charge an particle
C	Intensity of magnetic field
D	Energy of particle

Question 46

The resistance of ideal voltmeter is

A	Infinite
B	Zero
C	Very high
D	Very low

Question 47

The magnetic force is

A	Deflecting force
B	Lorentz force
C	Electric force
D	Restoring force

Question 48

The e/m of a neutron is

A	Greater than electron
B	Less than electron
C	The same as electron
D	Zero

Question 49

In order to increase the range of an ammeter, the shunt resistance is

A	Sometimes is increased and sometimes decreased
B	Decreased
C	Kept constant
D	Increased

Question 50

The brightness of spot on CRO screen is controlled by

A	Anode
B	Cathode
C	Grid
D	Plates

Question 51

The magnetic flux B is equal to

A	BA sinΘ
B	B/A
C	B^?.A^?
D	B^? x A^?

Question 52

The sensitivity of galvanometer is given by

A	BAN/C
B	BN/CA
C	C/BAN
D	CAN/B

Question 53

Total Flux through a closed surface depends on

A	Charge enclosed only
B	Shape of Surface
C	Charge and Medium
D	Medium Only

Question 54

If 0.5 T filled over an area of 2(m²) which lies at an angle of 60^° with field. Then the resulting flux will he

A	0.50 T
B	0.25T
C	0.50 web
D	0.25 Wb

Question 55

A voltmeter is an electrical instrument which is used to measure

A	Potential difference
B	Current
C	All of these
D	Resistance

Question 56

The magnetic force is simply a

A	Gravitational force
B	Reflecting force
C	Restoring force
D	Deflecting force

Question 57

In order to measure potential difference voltmeter is always connected in

A	Parallel
B	Both A and B
C	Series
D	Neither is series nor in parallel

Question 58

The CRO is used for

A	Displaying the wave form of frequency
B	Displaying wave form of given voltage
C	Converting A.C into D.C
D	Displaying the wave form of given vibration

Question 59

DMM stands for

A	None of these
B	Digital millimeter
C	Digit measuring Meter
D	Digital multimeter

Question 60

Torque on a current carrying coil is given by

A	τ = NIABsinα
B	τ = NIABcosα
C	τ = NWABsinα
D	τ = NWABcosα

Question 61

If a high resistance is connected in series with the galvanometer the resulting instrument is called

A	A voltmeter
B	A potentiometer
C	An AVO meter
D	An ammeter

Question 62

Brightness of screen of CRO controlled by

A	Anode
B	Filament
C	Grid
D	Cathode

Question 63

Useful device to measure resistance current and voltage is an electronic instrument called

A	Ammeter
B	Digital Multimeter
C	Voltmeter
D	Ohmmeter

Question 64

To convert a-galvanometer into an ammeter, of range I ampere the shunt resistance is given by

A	R_s = (I_gR_g)/(I-I_g)
B	R_s = (I_gR_g)/(I+I_g)
C	R_s = (I- I_g)/(I_gR_g)
D	R_s = (I- I_g)/(I_gR_g)

Question 65

The sensitivity of galvanometer is given by

A	CAN/B
B	C/BAN
C	BAN/C
D	BN/CA

Question 66

A magnetic needle is kept in a non-uniform magnetic field it experience

A	A force and a torque
B	Torque but not force
C	Neither a force nor a torque
D	Force but not torque

Question 67

The brightness of spot in CRO is controlled by

A	Cathode
B	Anode
C	Grid
D	Deflecting Plates

Question 68

The ray which remain undeflected in a magnetic field is

A	Cathode rays
B	βRays
C	γRays
D	αrays

Question 69

Two parallel straight wires carrying current in same direction will

A	May repel or attract
B	Attract each other
C	Repel each other
D	No effect

Question 70

The galvanometer can be made sensitive by making the factor BAN/C

A	Zero
B	Large
C	Constnt
D	Small

Question 71

The sensitivity of a galvanometer can be, increased by

A	Increasing the magnetic field
B	Using a fine suspension
C	Decreasing the area of the coil
D	Decreasing the number of turns of coil

Question 72

A 2Mev proton is moving perpendicular to a uniform magnetic field of 2.5T. Which of the following is the magnetic force on proton?

A	8 x10^-11N
B	8 x 10^-12N
C	2.5 x 10^-10N
D	2.5 x 10^-11N

Question 73

An electron enters the magnetic field at right angle from left B is into paper. The electron will be deflected

A	Towards left
B	Towards right
C	Downwards
D	Upward

Question 74

A voltmeter is always connected in circuit in

A	Parallel
B	Series
C	None of these
D	Both a and b

Question 75

One Tesla is equal to

A	N Am
B	N^-1Am^-1
C	NA^-1m
D	NAm^-1

Question 76

A charged particle enters in a strong magnetic field its k.E.

A	Remain constant
B	Increases
C	Decreases
D	Increases then Decreses

Question 77

A horizontal wire of 10cm and mass 0.3gm carries a current of 5A. Which of the following is the magnitude of the magnetic field that can support the weight of wire?

A	6 x 10^-3T
B	6 x 10^-4T
C	3 x 10^-3T
D	3 x 10^-4T

Question 78

The unit of Magnetic Flux

A	Nm^-1A^-1
B	NmA
C	NmA^-1
D	Nm^-1A

Question 79

The sensitivity of galvanometer is given by

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

Question 80

If a charge is at rest in a magnetic field then force on charge is

A	q VB cosΘ
B	Zero
C	q(V^? x B^?
D	q VB sinΘ

Question 81

The high resistance Rh to convert a galvanometer into a voltmeter is Rh=

A	(R_gg)
B	(V/I_g)-(R_g)
C	(I_g)/(I-I_g)
D	(V/I_g)+(R_g)

Question 82

Emf is induced due to change in

A	Electric field
B	Magnetic flux
C	Current
D	Charge

Question 83

In a current carrying long solenoid the magnetic filed produced does not depend upon

A	The radius of solenoid
B	All of the above three
C	Number of turns per unit length
D	Current flowing through solenoid

Question 84

Two parallel wires carrying current in the same direction:

A	Attract each other
B	Repel each other
C	Cancel their fields
D	No effect on each other

Question 85

The sum of electric and magnetic force is called

A	Newton's force
B	Centripetal force
C	Lorentz force
D	Maxwell force

Question 86

A current flows in a conductor from east to west. The direction of the magnetic field at a point above the conductor is towards

A	West
B	North
C	South
D	East

Question 87

Torque is produced in a current carrying coil when it is placed in a

A	Magnetic field
B	Electric field
C	Nuclear field
D	Gravitational field

Question 88

The brightness of the spot on CRO screen is controlled by

A	Grid
B	Cathode
C	Deflecting Plates
D	Anode

Question 89

When an electron is entered in a magnetic field, The magnitude of velocity of electron

A	Increases
B	Is independent of field strength
C	Decrease
D	Depend on field strength

Question 90

A strong magnetic field is applied to a stationary electron then

A	Electron move opposite to the field
B	Electron start spinning
C	Electron remain stationary
D	Electron move in the direction of field

Question 91

A device which can measure current, potential difference and resistance is called

A	Ohmmeter
B	Ammeter
C	Volt meter
D	AVO meter

Question 92

Galvanometer can be converted into voltmeter by connecting a high resistance in:

A	Series with galvanometer
B	Parallel as well as series with the galvanometer
C	Parallel with galvanometer
D	None of these

Question 93

The value of permeability of free space µ₀ is given by

A	4 x 10^-9 Wb A^-1m^-1
B	4 x 10^-7 Wb A^-1m^-1
C	4 x 10⁷ Wb A^-1m^-1
D	4 x 10^-7 Wb Am

Question 94

A charged particle is moving in uniform magnetic field in a circle. The radius of circular path is R. If q nervy of particle is doubled then the new radius will be

A	R/2
B	√2R
C	2R
D	R/√2

Question 95

If a long hollow copper pipe carries a direct current The magnetic field due to current will be

A	Both inside and outside the pipe
B	Only inside the pipe
C	Neither inside nor outside the pipe
D	Only outside the pipe

Once you are finished, click the button below. Any items you have not completed will be marked incorrect. Get Results

There are 95 questions to complete.

←

List

→

Return

Shaded items are complete.

1	2	3	4	5
6	7	8	9	10
11	12	13	14	15
16	17	18	19	20
21	22	23	24	25
26	27	28	29	30
31	32	33	34	35
36	37	38	39	40
41	42	43	44	45
46	47	48	49	50
51	52	53	54	55
56	57	58	59	60
61	62	63	64	65
66	67	68	69	70
71	72	73	74	75
76	77	78	79	80
81	82	83	84	85
86	87	88	89	90
91	92	93	94	95
End