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

Alternating current can induce voltage because it has a

Question # 2

The wave form of alternating voltage is the graph between:

Question # 3

Which one of the following is correct?

Question # 4

When the pn-junction is forward biased. the current flows through it is of the order of

Question # 5

In series RC circuit when R=Xc, then the phase angle is

Question # 6

The bridge circuit of full wave rectification uses

Question # 7

When the pn-junction is connected reversed biased, its resistance is of the order of

Question # 8

In a normally biased n-p-n transistor, an electron c current IEflows from the

Question # 9

Chock consumes externally small

Question # 10

OP-AMP has the following input terminals

Question # 11

The R1= infinity and R2= 0, then the gain of non-inverting amplifier is

Question # 12

The power factor of resonant series circuit is

Question # 13

The value of the potential difference across the depletion region for the case of germanium is

Question # 14

At resonance frequency the impedance of parallel resonance circuit is

Question # 15

The basic circuit element in D.C. circuit is:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 At resonance, the phase angle for RLC series resonance circuit equals
A. 0°
B. 90°
C. 180°
D. 270°
2 In which of the following components, pn-junction is used
A. light emitting diode
B. photo diode
C. photo voltaic cell
D. all of these
3 Which of the following diode is used for the detection of light
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them
4 Peak value of alternative current is:
A. one of its Instantaneous value
B. Equal to its RMS value
C. The same as its peak-to-peak value
D. Both (B) and (C)
5 If the value of C in a series RLC circuit is increased, the resonant frequency
A. Is not affected
B. Increase
C. Remains the same
D. Decreases
6 The most common source of alternating voltage is:
A. Motor
B. Transformer
C. AC genrator
D. Both (A) and (C)
7 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
8 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization
9 The closed loop gain of the non-inverting amplifier is given by
A. G = R2/R1
B. G = -R2/R1
C. G = 1 - R2/R1
D. G = 1 + T2/R1
10 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance

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