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 bridge circuit of full wave rectification uses

Question # 2

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

Question # 3

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

Question # 4

Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length

Question # 5

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

Question # 6

Which one of the following waves belongs to electromagnetic spectrum

Question # 7

At higher frequency of the alternating current, the capacitive reactance Xc

Question # 8

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

Question # 9

The power factor of resonant series circuit is

Question # 10

A signal is amplified at the output without any change of phase, if it is applied at the

Question # 11

The alternative voltage of current is actually measured by:

Question # 12

Chock consumes externally small

Question # 13

OP-AMP has the following input terminals

Question # 14

Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is

Question # 15

The highest value reached by the voltage or current:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 A signal is amplified at the output without any change of phase, if it is applied at the
A. inverting input
B. non-inverting input
C. at any of the input
D. none of these
2 When either L or C is increased, the resonant frequency of the RLC series circuit
A. Increases
B. Decreases
C. Remains the same
D. Becomes zero
3 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
4 Alternating current can induce voltage because it has a
A. High peak value
B. Varying magnetic field
C. Stronger field than direct curren
D. Constant magnetic field
5 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
6 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
7 The phase at the positive peak of an A.C. cycle is:
A. 0º

B. 90º

C. 180º

D. 0 andᏘ
8 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
9 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
10 In series RC circuit when R=Xc, then the phase angle is
A. 0°
B. 90°
C. 70°
D. 45°

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