Physics MCQs 2nd Year Chapter No.4 ELECTROMAGNETIC INDUCTION Test No. 1, FSc, Grade 12, Second Year Multiple Choice Questions, Medical College ( MDCAT ) , ECAT & University Admission Entry Test Exams Online Preparation, Chapter Wise Questions Answers Quiz Notes in Pdf Download, All Old Board Papers included, All Queries reply within 24 Hours. Click here to Contact us for any Query/Question regarding Exams.

PHYSICS – 2nd Year
Chapter No. 4  [Test No.1]
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. 4 (Test No. 1)
Total MCQ from Text Book :  89
Book Version  :

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 : 89
Total Time :   89 minutes




1 / 89

An induced emf is produced in a circuit when

2 / 89

The mathematical expression for self-inductance of coil is given by

3 / 89

Energy stored per unit volume inside the solenoid is called

4 / 89

In self induction phenomenon, the total flux through the coil is directly proportional to the ----- through the coil

5 / 89

The motional emf in a conductor can be increased by

6 / 89

The direction of the induced current in a certain coil can easily be found by using

7 / 89

Induced current always acts to ------- the magnetic flux through the circuit

8 / 89

Current can be induced in a coil by changing the area of the coil in a

9 / 89

The back emf of a motor can be expressed as

10 / 89

An inductor may store energy in

11 / 89

1 VsA-1 =

12 / 89

The emf induced by the motion of a conductor across a magnetic field is called

13 / 89

If N is the number of turns in a coil, the value of self-inductance varies as

14 / 89

The amount of torque in D.C. motors, depends upon

15 / 89

The mutual inductance of coils depends upon

16 / 89

If the coil is wound on an iron core, the flux through it will

17 / 89

If the length of a conductor placed parallel to magnetic field is doubled, the induced emf

18 / 89

In alternating current, inductors behaves like

19 / 89

Self inductance (L) of a coil is

20 / 89

SI unit of mutual inductance is

21 / 89

If the number of turns and the length of an inductor is doubled, then inductance(L) becomes

22 / 89

A device which converts mechanical energy into electrical energy is called

23 / 89

Faraday's law is based upon law of conservation of

24 / 89

The self inductance of the coil depends upon

25 / 89

In mutual induction, the coil placed with source of electric energy is called

26 / 89

Lenz's law is in accordance With the law Of conservation of

27 / 89

The emf induced in the coil of A.C. generator will be maximum when the angle between the plane of coil and the magnetic field is

28 / 89

If the plane of A.C. generator coil is parallel to the field, then emf induced or current in coil is

29 / 89

In D.C. generator, output of every coil is tapped only as it reaches its

30 / 89

The coil used to obtain the output by mutual induction phenomenon is known as

31 / 89

If the plane of A.C. generator coil is perpendicular to the field, then emf induced or current in coil is

32 / 89

Which one of the following expressions for mutual inductance is correct

33 / 89

A motor is a device which converts electrical energy into

34 / 89

The number of coils wound around an iron cylinder and rotated in magnetic field is called

35 / 89

Back motor effect in generators is in accordance with law of conservation of

36 / 89

Motional emf does not depend upon

37 / 89

The self inductance of a coil ---- when a soft iron is placed into it

38 / 89

When current flows through the armature coil, the force on the conductor produces

39 / 89

The current flowing through a coil due to induced emf hi it depends upon

40 / 89

The ratio Of the emf induced in the secondary coil to the rate of change of current in the primary coil is known as

41 / 89

A generator running in reverse may be called as

42 / 89

The induced emf in a rotating coil of A.C. generator varies with time

43 / 89

Commutator was invented by

44 / 89

Alternating emf is produced by rotating a rectangular coil of wire in

45 / 89

When a motor car is started its head light first becomes slight dim because the voltage across the lamp

46 / 89

The only difference between construction of D.C. generator and an A.C. generator is that of

47 / 89

If a conductor of length 1 m is moved with velocity V across a magnetic field B at an angle of 30° with B ,then motional emf will be

48 / 89

In case of alternating current, the average value of current and voltage is

49 / 89

Faraday law is given by

50 / 89

Mutual inductance has a practical role in the performance of the

51 / 89

The ratio of average emf in the coil to the time rate of change of current in the same coil is called

52 / 89

The working of A.C. generator is based upon the phenomenon of

53 / 89

weber / ampere is the 'unit of

54 / 89

The, phenomenon of induced emf was observed by Faraday and Henry in

55 / 89

When a motor is over loaded; then the magnitude of back emf

56 / 89

One henry is equal to

57 / 89

When motor is started, the back emf is

58 / 89

△Φ/△t has the same unit as that of

59 / 89

The fact that emf produced by motion of a coil across a magnetic field was discovered by

60 / 89

The phenomenon in which changing current in a coil induces an emf in itself is called

61 / 89

The principle of an electric generator is based on

62 / 89

The SI unit of self-inductance is

63 / 89

A.C current reverses its direction

64 / 89

Lenz's law deals directly with the

65 / 89

Commutator was invented in

66 / 89

The induced emf lasts so long as the magnetic flux keeps

67 / 89

The motional emf of a conductor of length L and moving perpendicular to a magnetic field B is equal to

68 / 89

A metallic ring is attached to wall of a room When the north pole of bar magnet is brought near the ring, the induced current in the ring is

69 / 89

If a conductor is placed perpendicular to a magnetic field B is then motional emf will be

70 / 89

The device which is used to increase or decrease the value of alternating voltage is called

71 / 89

The energy stored in an inductor is given by

72 / 89

The inductance in a coil plays the same role in AC circuits as in ----- play in mechanics

73 / 89

Alternating current generator uses

74 / 89

The value, of the induced emf in a loop of wire is directly proportional to the rate of change of ------ through the loop

75 / 89

It is the converse process of magnetic effect of current

76 / 89

The working of electric motor is reversed of

77 / 89

The maximum emf produced by an alternating generator is

78 / 89

The phenomena by which an induced emf is produced due to change of flux is called

79 / 89

If back emf in a motor decreases, then it will draw

80 / 89

The component mainly used in a D.C. generator is

81 / 89

The mutual inductance of two coils is given by the relation

82 / 89

The fluctuations of the output of generator can be reduced by

83 / 89

A motor of zero back emf draws ---- current

84 / 89

The device in the circuit that consumes electrical energy is called

85 / 89

If a steady current is passing though a coil then the self induced emf in it will be

86 / 89

The self-inductance of the coil is given by

87 / 89

The most common source of an A.C. voltage is

88 / 89

The induced emf in a motor which opposes the applied emf running the motor is called

89 / 89

In motional emf experiment when the system reaches an equilibrium state

Your score is

The average score is 40%


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