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




82

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 device in the circuit that consumes electrical energy is called

2 / 89

One henry is equal to

3 / 89

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

4 / 89

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

5 / 89

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

6 / 89

An inductor may store energy in

7 / 89

The self inductance of the coil depends upon

8 / 89

Alternating current generator uses

9 / 89

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

10 / 89

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

11 / 89

A device which converts mechanical energy into electrical energy is called

12 / 89

Faraday law is given by

13 / 89

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

14 / 89

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

15 / 89

Energy stored per unit volume inside the solenoid is called

16 / 89

The principle of an electric generator is based on

17 / 89

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

18 / 89

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

19 / 89

It is the converse process of magnetic effect of current

20 / 89

The mutual inductance of coils depends upon

21 / 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

22 / 89

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

23 / 89

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

24 / 89

The motional emf in a conductor can be increased by

25 / 89

Commutator was invented by

26 / 89

In motional emf experiment when the system reaches an equilibrium state

27 / 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

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

An induced emf is produced in a circuit when

30 / 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

31 / 89

△Φ/△t has the same unit as that of

32 / 89

The self-inductance of the coil is given by

33 / 89

In alternating current, inductors behaves like

34 / 89

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

35 / 89

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

36 / 89

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

37 / 89

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

38 / 89

The back emf of a motor can be expressed as

39 / 89

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

40 / 89

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

41 / 89

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

42 / 89

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

43 / 89

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

44 / 89

1 VsA-1 =

45 / 89

Lenz's law deals directly with the

46 / 89

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

47 / 89

Faraday's law is based upon law of conservation of

48 / 89

The induced emf lasts so long as the magnetic flux keeps

49 / 89

When motor is started, the back emf is

50 / 89

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

51 / 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

52 / 89

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

53 / 89

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

54 / 89

The working of electric motor is reversed of

55 / 89

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

56 / 89

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

57 / 89

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

58 / 89

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

59 / 89

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

60 / 89

Self inductance (L) of a coil is

61 / 89

Motional emf does not depend upon

62 / 89

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

63 / 89

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

64 / 89

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

65 / 89

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

66 / 89

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

67 / 89

The SI unit of self-inductance is

68 / 89

A motor is a device which converts electrical energy into

69 / 89

weber / ampere is the 'unit of

70 / 89

Mutual inductance has a practical role in the performance of the

71 / 89

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

72 / 89

A.C current reverses its direction

73 / 89

The maximum emf produced by an alternating generator is

74 / 89

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

75 / 89

The mutual inductance of two coils is given by the relation

76 / 89

A generator running in reverse may be called as

77 / 89

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

78 / 89

The energy stored in an inductor is given by

79 / 89

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

80 / 89

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

81 / 89

The fluctuations of the output of generator can be reduced by

82 / 89

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

83 / 89

Which one of the following expressions for mutual inductance is correct

84 / 89

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

85 / 89

SI unit of mutual inductance is

86 / 89

Commutator was invented in

87 / 89

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

88 / 89

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

89 / 89

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

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