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

In which of the following components, pn-junction is used

Question # 2

In frequency modulation (FM), the carrier waves amplitude

Question # 3

The input resistance of the OP-AMP is the resistance between the

Question # 4

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

Question # 5

The closed loop gain of the inverting amplifier is written as

Question # 6

Transmitting antenna emits

Question # 7

The open loop gain of OP-AMP is of the order of

Question # 8

When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency

Question # 9

Mathematical manipulation of the two quantized states can be best carried if they are represented by

Question # 10

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

Question # 11

For normal operation of transistor, the batteries

Question # 12

The sum of positive and negative peak values is called:

Question # 13

The wave form of alternating voltage is the graph between:

Question # 14

Which one of the following is correct?

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency
A. 9.4 kHz
B. 940 kHz
C. 94 kHz
D. None of these
2 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
3 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
4 Alternating current can be transmitted:
A. To long distance
B. At very high cost
C. At very low cost
D. Both (A) and (C)
5 In half wave rectification
A. both halves of the input voltage is used
B. only one half of the input voltage is used
C. either of these
D. none of these
6 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
7 When the emitter-base junction of a transistor is reverse biased, collector current
A. Reverses
B. Increases
C. Decreases
D. Stops
8 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
9 The Instantaneous value of alternative current maybe:
A. The same as its RMS value
B. Greater than its Rms value
C. The same as its peak value
D. Any of these
10 The circuit which is used to smooth the output voltage of the full-wave rectification is known as
A. transformer
B. rectifier
C. filter
D. none of these

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