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

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

2 / 89

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

3 / 89

It is the converse process of magnetic effect of current

4 / 89

Commutator was invented by

5 / 89

The self-inductance of the coil is given by

6 / 89

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

7 / 89

The SI unit of self-inductance is

8 / 89

One henry is equal to

9 / 89

Faraday law is given by

10 / 89

Commutator was invented in

11 / 89

Alternating current generator uses

12 / 89

In motional emf experiment when the system reaches an equilibrium state

13 / 89

A motor is a device which converts electrical energy into

14 / 89

The energy stored in an inductor is given by

15 / 89

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

16 / 89

The motional emf in a conductor can be increased by

17 / 89

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

18 / 89

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

19 / 89

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

20 / 89

An inductor may store energy in

21 / 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

22 / 89

The working of electric motor is reversed of

23 / 89

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

24 / 89

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

25 / 89

The back emf of a motor can be expressed as

26 / 89

The device in the circuit that consumes electrical energy is called

27 / 89

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

28 / 89

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

29 / 89

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

30 / 89

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

31 / 89

The induced emf lasts so long as the magnetic flux keeps

32 / 89

An induced emf is produced in a circuit when

33 / 89

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

34 / 89

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

35 / 89

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

36 / 89

A.C current reverses its direction

37 / 89

The mutual inductance of coils depends upon

38 / 89

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

39 / 89

Energy stored per unit volume inside the solenoid is called

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

The fluctuations of the output of generator can be reduced by

42 / 89

Motional emf does not depend upon

43 / 89

A device which converts mechanical energy into electrical energy is called

44 / 89

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

45 / 89

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

46 / 89

The mutual inductance of two coils is given by the relation

47 / 89

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

48 / 89

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

49 / 89

The maximum emf produced by an alternating generator is

50 / 89

△Φ/△t has the same unit as that of

51 / 89

The principle of an electric generator is based on

52 / 89

The self inductance of the coil depends upon

53 / 89

Faraday's law is based upon law of conservation of

54 / 89

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

55 / 89

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

56 / 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

57 / 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

58 / 89

Which one of the following expressions for mutual inductance is correct

59 / 89

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

60 / 89

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

61 / 89

Self inductance (L) of a coil is

62 / 89

1 VsA-1 =

63 / 89

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

64 / 89

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

65 / 89

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

66 / 89

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

67 / 89

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

68 / 89

When motor is started, the back emf is

69 / 89

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

70 / 89

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

71 / 89

A generator running in reverse may be called as

72 / 89

Mutual inductance has a practical role in the performance of the

73 / 89

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

74 / 89

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

75 / 89

In alternating current, inductors behaves like

76 / 89

Lenz's law deals directly with the

77 / 89

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

78 / 89

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

79 / 89

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

80 / 89

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

81 / 89

weber / ampere is the 'unit of

82 / 89

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

83 / 89

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

84 / 89

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

85 / 89

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

86 / 89

SI unit of mutual inductance is

87 / 89

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

88 / 89

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

89 / 89

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

Your score is

The average score is 48%


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