ECAT Pre Computer Science Chapter 16 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 16 Alternating Current

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

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ECAT Physics Chapter 16 Alternating Current

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Question # 1

For a n-p-n transistor, the conventional current equation can be written as

Question # 2

Alternating current is produced by a voltage source which polarity:

Question # 3

Which of the following diodes can operate in the reverse biased condition

Question # 4

If we connect a A.C. volt meter to read A.C. voltage, It would read its:

Question # 5

An A.C varies as a function of

Question # 6

The most common source of alternating voltage is:

Question # 7

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

Question # 8

During the negative half-cycle of the half-wave rectification, the diode

Question # 9

The highest value reached by the voltage or current:

Question # 10

Alternating current can induce voltage because it has a

Question # 11

The time interval during which the Voltage source changes its polarity once is known as:

Question # 12

Which of the following diode is used for the detection of light

Question # 13

During each cycle, alternating voltage reaches a peak value

Question # 14

The output voltage of half wave rectification is in the form of

Question # 15

The average of A.C. current and voltage over a complete cycle is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
2 The value of the input resistance of OP-AMP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several maga ohms
3 To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance
A. 5.07 pF
B. 50 pF
C. 0.507 pF
D. 507 pF
4 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
5 In a normally biased n-p-n transistor, an electron c current IEflows from the
A. emitter into the base
B. collector into the base
C. base into collector
D. none of these
6 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization
7 In n-p-n transistor, emitter base junction is kept
A. reversed
B. forward biased
C. may be reversed or may be forward biased
D. none of these
8 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
9 The basic circuit element in A.C. circuits are:
A. Resistor and capacitor
B. Resistor and Inductor
C. Capacitor only
D. Both (B) and (C)
10 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

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  • Iiqra Fatima

    Iiqra Fatima

    25 May 2018

    You should let us practice difficult mcqs ..These are too easy for ECAT level....Thanku

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