ECAT Pre Engineering Physics Chapter 16 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Question # 1

The power factor of resonant series circuit is

Question # 2

For normal operation of transistor, the batteries

Question # 3

In free space, the speed of electromagnetic waves is

Question # 4

The basic circuit elements of A.C circuit are

Question # 5

Conversion of alternating current into direct current is called

Question # 6

Alternating current can induce voltage because it has a

Question # 7

In an A.C circuit with resistor only, the current and voltage have a phase angle of

Question # 8

The most common source of alternating voltage is:

Question # 9

The sum of positive and negative peak values is called:

Question # 10

During the positive half-cycle in the half-wave rectification,the diode

Question # 11

Transmitting antenna emits

Question # 12

A changing magnetic flux creates around itself

Question # 13

If 250V is the RMS value of alternative voltage, then its peak value Vowill be:

Question # 14

Nowadays, Most of the electric energy is produced by the A.C. generators using:

Question # 15

The phase at the positive peak of an A.C. cycle is:

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ECAT Chapter 16 Important MCQ's

Sr.# Question Answer
1 If we connect a A.C. volt meter to read A.C. voltage, It would read its:
A. RMS value
B. Instantaneous value
C. Valued average over a cycle
D. Zero
2 At resonance, the impedance of RLC series circuit is
A. Maximum
B. Zero
C. Minimum
D. Determinate
3 For a n-p-n transistor, the conventional current equation can be written as
A. IE+ IC= IB
B. IC- IB= IE
C. IC+ IB= IE
D. IB+ IE= IC
4 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
5 The highest value reached by the voltage or current:
A. In quarter cycle is called Instantaneous value
B. In half cycle is called peak-to-peak value
C. In one cycle is called peak value
D. In half cycle is called Instantaneous value
6 The wave form of alternating voltage is the graph between:
A. Voltage across X-axis and time across y-axis
B. Current and time
C. Voltage along y-axis and time along x-axis
D. Voltage and current
7 The value of current gain of n-p-n transistor is of the order of
A. tens
B. hundreds
C. thousands
D. ten thousands
8 When the p-n junction is forward biased its resistance is of the order of
A. few mega ohms
B. few kilo ohms
C. few ohms
D. few milli ohms
9 A p-n junction is formed when a crystal of silicon is growth in such a way that its one half is doped with trivalent impurity and the other half with a impurity from
A. 2nd group
B. fourth group
C. fifth group
D. sixth group
10 When the pn-junction is connected reversed biased, its resistance is of the order of
A. few ohms
B. few kilo-ohms
C. few mega-ohms
D. few mili-ohms

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