# PHYSICS 2nd Year MCQs Chapter No.5 ALTERNATING CURRENT Online MDCAT Exams Preparation Test No.2

Physics MCQs 2nd Year Chapter No.5 ALTERNATING CURRENT 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
Chapter Name : Alternating Current
Chapter No. 5  [Test No.2]
2nd Year
Multiple Choice Questions

##### Book Name :  PHYSICS Chapter No. 5 (Test No.2)Chapter Name : Alternating Current  Total MCQ from Text Book :  100Book Version  : 2022 Published By : Punjab Text Book Board Lahore Approved By : Govt of the Punjab and Federal Ministry for Education Test Type : MCQ’sExam conduct By : Inter Boards of Sindh, KPK, Balochistan, AJK, Gilgit Baltistan, Punjab & Federal Class / Grade  : 12 ( F.Sc. Intermediate)Total Marks : 100 Total Time :   100 minutes
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GRADE 12 - PHYSICS CHAPTER NO.5 ALTERNATING CURRENT Test No. 2

GRADE 12 - PHYSICS CHAPTER NO.5 ALTERNATING CURRENT Test No. 2

1 / 100

If Vo is thee value of A.C. voltage its rms value is

2 / 100

In free space, the radio waves travel with a speed

3 / 100

For practice L-C parallel circuit the current at resonance frequency is

4 / 100

At low frequency of the alternating current, the inductive reactance XL

5 / 100

Choke consumes extremely small

6 / 100

In a pure capacitor A.C. circuit, the current I anti charge q are

7 / 100

Maxwell's equation were discovered by .James Clark Maxwell in.

8 / 100

The basic circuit element in a D.C. circuit which controls the current or voltage is a

9 / 100

The current which keeps on reversing its direction (or polarity) with lime is called

10 / 100

The examples of electromagnetic waves are

11 / 100

If we connect an ordinary D.C. ammeter to measure alternating current, it Would measure its

12 / 100

In capacitive circuit, at high frequency, the current will he

13 / 100

The power dissipated in a pure inductive or capacitance, circuit is

14 / 100

A choke is a coil having

15 / 100

In a three phase A.C, generator, the phase difference between each pair of coil is equal to

16 / 100

The frequency at which an inductor of 1.0 H have a reactance of 500 ?
is

17 / 100

The frequency for 2 henry inductor having reactance of 1000? is

18 / 100

The unit of reactance is Xc of a a capacitor joined across alternating source can be found by the relation

19 / 100

The flow of D.C. is blocked by

20 / 100

An incandescent lamp will reach its maximum brilliance ________time per second when connected to a 220V,50Hz source

21 / 100

A changing magnetic field creates a

22 / 100

The value of resonance frequency f1 in case of series resonance circuit is given by

23 / 100

In an A.C. circuit with pure capacitor only, the current

24 / 100

A choke coil is used to limit current in

25 / 100

Voltage across any two lines of a three phase A.C. supply is about

26 / 100

SI unit of impedance is

27 / 100

The average of square value of alternating current or voltage over a complete cycle is:

28 / 100

The SI unit of inductance is

29 / 100

The main reason far the world-wide use of A.C. is that it can be transmitted to

30 / 100

In RLC series circuit, at high frequency

31 / 100

The ratio of the rms value Of the applied voltage to the rms value of A.C. is called

32 / 100

The combined effect of resistance and reactance in an AC circuit is called

33 / 100

The phase at the negative peak of A.0 is

34 / 100

At low frequency of the alternating current, the current will be

35 / 100

A resonance curve for RLC circuit is a plot of frequency versus

36 / 100

Electromagnetic waves were discovered by

37 / 100

As frequency of AC increases

38 / 100

The highest value reached, by A.C. voltage or current in one cycle is called

39 / 100

A sinusoidal current has rms (effective) value of 10A. Its maximum value is

40 / 100

In the RLC parallel circuit, the resonance frequency is

41 / 100

A device that allows only the continuous flow of an A.C. through a circuit is

42 / 100

In a capacitive A.C. circuit the charge q and applied voltage V are

43 / 100

An A.C. varies as a function of

44 / 100

In RLC series circuit, the impedance of the circuit at resonance is

45 / 100

The inductance and capacitance behave as a function of

46 / 100

In a pure inductor coil the power dissipated is

47 / 100

In a three phase A.C. generator, there are three coils inclined at

48 / 100

The phase angle between the voltage and current in resistive A.C. circuit is

49 / 100

Which of the following EMW has the longest wavelength?

50 / 100

In capacitor circuit, at low frequency, the current will be

51 / 100

In the equation P = IV cos 0, cos 0 is called

52 / 100

Which of the following waves are more energetic

53 / 100

Which one Of the following waves are not electromagnetic waves?

54 / 100

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

55 / 100

In a L-C parallel circuit at the resonance condition the current and applied voltage are

56 / 100

The averagelueiof alternating current or voltage over a complete cycle is

57 / 100

The graph between alternating voltage and time is a

58 / 100

The output voltage of an A.C. generator at time t = T/4 is given by

59 / 100

The inductive reactance of the coil is given by the expression

60 / 100

The output voltage of n A.C. generator at time t = T/2 is given by

61 / 100

Metals detectors arc made by the combination of

62 / 100

For a practical L-C parallel circuit at the resonance frequency the circuit impedance is

63 / 100

In free space, the speed of electromagnetic waves is

64 / 100

A device that allows only the continuous flow of A.C. through a circuit is

65 / 100

Electromagnetic waves emitted from an antenna arc

66 / 100

The expression P = VI holds only when current and voltage are

67 / 100

The electric field and magnetic field and the direction of propagation of electromagnetic waves are mutually

68 / 100

The capacitance required to construct a resonance circuit of frequency 1000 KHz with an inductor of 5mH is

69 / 100

In RLC series circuit, the current at resonance frequency is

70 / 100

Current in a dry-cell is an example of

71 / 100

The opposition offered by the inductor to the flow of A.C. is called

72 / 100

In three phase A.C. generator, the voltage between any line and the neutral line is

73 / 100

In the resonance condition of RLC series circuit the power factor is

74 / 100

In a R-L series circuit, the current

75 / 100

The expression P = VI is true in case of A.C. circuit when

76 / 100

The inductive reactance is directly proportional to

77 / 100

In a R-C series circuit, the current

78 / 100

Capacitor of 2000 μF is connected across alternating source of 20 volts. If frequency of the source is 50/? 117 Hz then reactance of the capacitor is:

79 / 100

Electromagnetic waves consists of

80 / 100

The waves which do not require any material medium for their propagation are called

81 / 100

Alternating current is that which is produced by a voltage source whose polarity

82 / 100

A radio transmitting antenna provides a good example of generating

83 / 100

The power dissipated in resistive circuit is

84 / 100

Which of the following has smallest wavelength?

85 / 100

In capacitive circuit, at high frequency, the reactance will be

86 / 100

The opposition offered by a capacitor to the flow of A.C. is called-its

87 / 100

In RLC series circuit, at resonance condition the voltage and current are

88 / 100

If Io is the peak value of A.C. current, itsaverage value over the complete cycle is:

89 / 100

As A.C. continuously flows through the plates of a capacitor because of

90 / 100

In pure resistive A.C. circuit the instantaneous values of voltage and current are

91 / 100

The A.C. circuit in which current and voltage are in phase, the power factor is

92 / 100

In a pure capacitor A.C. circuit, the current and the applied voltage are

93 / 100

In L-C parallel circuit at resonance condition the power factor is

94 / 100

A three phase A.C. generator, if the first coil has phase 0, then the other two coils will have phases

95 / 100

The capacitance required to construct a resonance circuit of frequency 1000 KHz with an inductor of 5mH is

96 / 100

At resonance frequency, the impedance of RLC series circuit is

97 / 100

Ohm is the unit of

98 / 100

In L-C parallel circuit the capacitor draws a

99 / 100

The behavior of resistance is independent of

100 / 100

The P-P value of AC voltage wave form is

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