PHYSICS 2nd Year MCQs Chapter No.4 ELECTROMAGNETIC INDUCTION Test No.1

PHYSICS 2nd Year MCQs Chapter No.4 ELECTROMAGNETIC INDUCTION Test No.1

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 Name : ELECTROMAGNETIC INDUCTION
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)
Chapter Name : ELECTROMAGNETIC INDUCTION 
Total MCQ from Text Book :  89
Book Version  : 2022
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




40

GRADE 12 - PHYSICS CHAPTER NO.4 ELECTROMAGNETIC INDUCTION Test No.1

GRADE 12 - PHYSICS CHAPTER NO.4 ELECTROMAGNETIC INDUCTION Test No.1

1 / 89

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

2 / 89

Lenz's law deals directly with the

3 / 89

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

4 / 89

The induced emf lasts so long as the magnetic flux keeps

5 / 89

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

6 / 89

The motional emf in a conductor can be increased by

7 / 89

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

8 / 89

Energy stored per unit volume inside the solenoid is called

9 / 89

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

10 / 89

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

11 / 89

The maximum emf produced by an alternating generator is

12 / 89

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

13 / 89

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

14 / 89

The mutual inductance of coils depends upon

15 / 89

An inductor may store energy in

16 / 89

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

17 / 89

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

18 / 89

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

19 / 89

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

20 / 89

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

21 / 89

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

22 / 89

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

23 / 89

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

24 / 89

When motor is started, the back emf is

25 / 89

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

26 / 89

The energy stored in an inductor is given by

27 / 89

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

28 / 89

Self inductance (L) of a coil is

29 / 89

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

30 / 89

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

31 / 89

Faraday law is given by

32 / 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

33 / 89

The mutual inductance of two coils is given by the relation

34 / 89

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

35 / 89

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

36 / 89

△Φ/△t has the same unit as that of

37 / 89

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

38 / 89

An induced emf is produced in a circuit when

39 / 89

In motional emf experiment when the system reaches an equilibrium state

40 / 89

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

41 / 89

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

42 / 89

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

43 / 89

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

44 / 89

The self-inductance of the coil is given by

45 / 89

Alternating current generator uses

46 / 89

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

47 / 89

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

48 / 89

1 VsA-1 =

49 / 89

The fluctuations of the output of generator can be reduced by

50 / 89

It is the converse process of magnetic effect of current

51 / 89

The device in the circuit that consumes electrical energy is called

52 / 89

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

53 / 89

Mutual inductance has a practical role in the performance of the

54 / 89

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

55 / 89

A device which converts mechanical energy into electrical energy is called

56 / 89

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

The back emf of a motor can be expressed as

59 / 89

SI unit of mutual inductance is

60 / 89

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

61 / 89

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

62 / 89

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

63 / 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

64 / 89

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

65 / 89

Which one of the following expressions for mutual inductance is correct

66 / 89

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

67 / 89

The SI unit of self-inductance is

68 / 89

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

69 / 89

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

70 / 89

In alternating current, inductors behaves like

71 / 89

Commutator was invented in

72 / 89

The self inductance of the coil depends upon

73 / 89

The working of electric motor is reversed of

74 / 89

A motor is a device which converts electrical energy into

75 / 89

The principle of an electric generator is based on

76 / 89

weber / ampere is the 'unit of

77 / 89

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

78 / 89

Commutator was invented by

79 / 89

Motional emf does not depend upon

80 / 89

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

81 / 89

A.C current reverses its direction

82 / 89

A generator running in reverse may be called as

83 / 89

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

84 / 89

One henry is equal to

85 / 89

Faraday's law is based upon law of conservation of

86 / 89

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

87 / 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

88 / 89

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

89 / 89

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

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