Second Year Physics Chapter 16 Online MCQ Test for 2nd Year Physics Chapter 16 Alternating Current Preparation

FSC Part 2 Physics
Chapter 16 Test

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Physics FSC Part 2 Chapter 16 Online MCQ's Test

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Question # 1

If the frequency of A.C. supplied is doubled then the capacitive reactance becomes.

Question # 2

If Vrms be the root mean square value of emf then its peak to peak value is given by

Question # 3

In metal detector, we use.

Question # 4

The expression P = VI hold only when current and voltage are.

Question # 5

The internal resistance of a capacitor is called:

Question # 6

When 10 V are applied to an A.C circuit, the current flowing in it is 100 mA. It impedance is.

Question # 7

The power factor of RL series circuit is.

Question # 8

The value of capacitive reactance is given by

Question # 9

The unit of impedance is.

Question # 10

During each cycle A.C. voltage reaches a peak value.

Question # 11

At resonance frequency, the impedance of RLC series circuit is.

Question # 12

In LR circiut which one of the following statements is correct?

Question # 13

The phase difference between the current and voltage at resonce is:

Question # 14

An electromagnetic wave goes from air to glass which of the following does not change?

Question # 15

In A.C circuit through a capacitor which one is:

Question # 16

Impedance is denoted by:

Question # 17

An A.C. voltmeter reads 220 V, its peak value will be

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FSC Part 2 Physics Chapter 16 Online Test MCQ's

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FSc Part II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 In RLC series circuit at resonance the phase difference between capacitor and inductor reactance is.
A. 90o
B. 270o
C. 0o
D. 180o
2 In a pure inductive A.C. circuit the current.
A. Lags behind voltage by 90 o
B. Leads the voltage by 90 o
C. In phase with voltage
D. Leads the voltage by 270 o
3 The basic circuit element in A.C. circuit which controls current.
A. Resistor only
B. Capacitor only
C. Inductor only
D. All of these
4 The resonance frequency is given by:
A. fr = 2π√LC
B. fr = 1/2πLC
C. fr = 1/ 2π√LC
D. f1 = 1/ 2πC√L
5 Xc =
A. 1/2πfc
B. 2πfc
C. 2π/fc
D. fc/2π
6 The wave form of alternating voltage is a
A. Cotangent curve
B. Cosine curve
C. Sine curve
D. Tangent curve
7 Power dissipated in a pure inductor is.
A. Large
B. Small
C. Infinite
D. Zero
8 In frequency modulation which factor changed.
A. Amplitude of charge carriers
B. Frequency of charge carriers
C. Amplitude of signal
D. Frequency of signal
9 The peak value of alternating current is 5√2 A. The mean square value of current will be:
A. 5A
B. 2.5A
C. 5√2A
D. 52
10 In the capacitive circuit of A.C. quantity when q= 0 the slope of q-t curve is.
A. Maximum
B. Minimum
C. Zero
D. Negative

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