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

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

Physics MCQs 2nd Year Chapter No.4 ELECTROMAGNETIC INDUCTION Test No. 2, 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.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. 4 ( Test No. 2 )
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  : 12th ( F.Sc. Intermediate)
Total Marks : 89
Total Time :   89 minutes




91

GRADE 12 - PHYSICS CHAPTER NO.4 ELECTROMAGNETIC INDUCTION Test No. 2

GRADE 12 - PHYSICS CHAPTER NO.4 ELECTROMAGNETIC INDUCTION Test No. 2

1 / 89

In step up transformer

2 / 89

The reactance of an Inductor at 50 Hz is 100 its reactance at 100 Hz becomes

3 / 89

Commutator was invented by

4 / 89

The current passing through a choke coil of 5H is decreasing at the rate of 2A/s Which of the following is the emf developed across the coil?

5 / 89

Self induced emf is sometimes called as

6 / 89

Lenz's law is in accordance with the Law of Conservation of

7 / 89

The induced currents setup in the core of transformer in a direction perpendicular to the flux are known as

8 / 89

The mutual inductance of a pair of coils each of N turns, is M henry. If a current of I ampere in one of the coil is brought to zero in t seconds, The average induced emf in other coil, in volt, will be

9 / 89

The working principle of transformer is

10 / 89

The devices in the circuit that consume electrical energy are known as

11 / 89

Energy density of an inductor is

12 / 89

Which of the following quantity remain unchanged in a transformer?

13 / 89

Transformer is used to change

14 / 89

Which of the following are the power losses in a transformer?

15 / 89

The mutual induction plays role in

16 / 89

In transformer which one of the following does not change

17 / 89

For on ideal Transformer

18 / 89

A solenoid of length / meter has self-inductance L henry. If the number of turns are doubled, its self-inductance

19 / 89

The energy stored in an inductor is given as

20 / 89

The angular speed of rotation of the coil of A.C generator is doubled. Then induced emf will be

21 / 89

In electromagnetic induction the induced emf is independent of

22 / 89

A coil having number of turns N and cross sectional area A is rotated in a uniform magnetic field B with an angular velocity w. Which of the following is the maximum induced emf in it?

23 / 89

The turn ratio of a step-up transformer is 4:1. If the current of 4A is passing through the primary coil. Then current in secondary coil will be

24 / 89

Eddy currents is one cause of energy loss, in

25 / 89

Self inductance does not depend upon

26 / 89

SI unit of mutual inductance is

27 / 89

Electricity can be transmitted overlong distances by

28 / 89

The turn ratio of a transformer is 10. It means that

29 / 89

A transformer

30 / 89

If the magnetic flux linked with a coil varies at the rate of 1Wb/min. Then induced emf will be

31 / 89

Energy stores in an inductor is given by

32 / 89

B2/µo is the expression of

33 / 89

The rod of unit length is moving at 30° through a magnetic field of 1 T. If velocity of rod is 1 m/s, then induced emf in the rod will be given by

34 / 89

When motor is just started, back emf is almost

35 / 89

The winding of the electromagnet in motor are usually called

36 / 89

In transformer works on the principle of

37 / 89

Mutual Induction has a practical role in the performance of the

38 / 89

The core of dynamo is laminated because

39 / 89

In a step up transformer the turn ratio of primary and secondary coil is 1:2. A cell of 1.5V is connected across the primary coil which of the following will be voltage of secondary coil?

40 / 89

Efficiency of transformer is not affected by

41 / 89

Transformer for domestic use step down the voltage to

42 / 89

The Lenz's Law fulfills

43 / 89

SI unit of self inductance is Henry which is

44 / 89

With the speed of motor, magnitude of black emf

45 / 89

Induction furnace based upon the concern of

46 / 89

Lenz's law is in accordance with law of conservation of

47 / 89

Turns ratio (r) for a step down transformer is

48 / 89

The core of transformer is-made of

49 / 89

Unit of self Inductance is

50 / 89

When a motor is over loaded, then the magnetic of back emf

51 / 89

The SI unit of magnetic induction is

52 / 89

An increase in number of turns of a coil result in

53 / 89

The turns ratio of a transformer is 10 it means that

54 / 89

Commutator's are used in

55 / 89

A step up transformer is used 120 v line to provide 240 v. If primary coil has 100 turns. The number of turns in secondary is

56 / 89

The motional emf is given by

57 / 89

When the motor is just started, back emf is

58 / 89

Energy density in inductor is given by

59 / 89

The self inductance of solenoid is

60 / 89

A transformer is used to step up or step down

61 / 89

The loss of energy over an A.C. cycle during the magnetization and demagnetization of transformer core is usually called

62 / 89

By placing soft iron inside a coil

63 / 89

A device which converts low voltage or current to high voltage or current is called

64 / 89

If the motor is overloaded then magnitude of back emf

65 / 89

Transformer makes possible the

66 / 89

The self-inductance of a coil is 5H. The current changes from 1A to 2A in 5 second through the coil. Which of the following is the value of induced emf produced in the coil?

67 / 89

Which of the following quantity decreases in a step-up transformer?

68 / 89

SI unit of self inductance is Henry which is

69 / 89

The equation for energy density is given as

70 / 89

Which one is not present in A.C generator?

71 / 89

Lenz's law is in accordance with the Law of Conservation of

72 / 89

If the speed of rotation of a generator is doubled the output voltage will be

73 / 89

In step down transformer

74 / 89

A conducting rod of length l falling with velocity V perpendicular to magnetic field B. Which of the following is potential difference between two ends

75 / 89

Lenz's law is in accordance with the Law of Conservation of

76 / 89

Commentator was invented in

77 / 89

When the back emf in a circuit is zero, it draws

78 / 89

If the motor is overloaded, the magnitude of back emf

79 / 89

The number of turns in a coil is increased from 10 to 100. Its self-inductance becomes

80 / 89

The mutual Inductance between two coils depends upon their

81 / 89

The main causes of power losses in a transformer are

82 / 89

A changing electric flux creates

83 / 89

A real transformer does not change

84 / 89

The self-induction is given by

85 / 89

If L and R denotes inductance and resistance then dimensional formula for L/R is

86 / 89

Henry is SI unit of

87 / 89

Lenz's law deals with

88 / 89

In case of inductor, energy is stored in the

89 / 89

Which one of the following is not present in an A.C generator

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