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

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

Question # 2

OP-AMP has the following input terminals

Question # 3

Alternating current is produced by a voltage source which polarity:

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 non-inverting amplifier is given by

Question # 6

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

Question # 7

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

Question # 8

If the value of C in a series RLC circuit is increased, the resonant frequency

Question # 9

A sinusoidally alternating voltage or current can be graphically represented by a:

Question # 10

The value of output resistance of OP-AMOP is of the order of

Question # 11

The device which allows only the flow of an A.C. through a circuit is

Question # 12

The entire wave form of sinusoidal voltage is actually a set of all the:

Question # 13

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

Question # 14

The closed loop gain of the inverting amplifier is written as

Question # 15

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The value of current gain of n-p-n transistor is of the order of
A. tens
B. hundreds
C. thousands
D. ten thousands
2 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
3 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
4 At higher frequency of the alternating current, the capacitive reactance Xc
A. Increases
B. Decreases
C. Remains the same
D. Increases only when the voltage increases
5 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
6 Which one of the following is correct?
A. Vo= 1.414 Vrms
B. Iams= 1.414 Io
C. VO = 10.70 Vrms
D. Both a and b
7 During each cycle, alternating voltage reaches a peak value
A. One time
B. Two times
C. Four times
D. A number of times depending on the frequency
8 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
9 In a transistor, if the central region is p-type then this type of transistor is known as
A. p-n-p transistor
B. n-p-n transistor
C. either of these
D. none of these
10 During the positive half-cycle in the half-wave rectification,the diode
A. does not conduct
B. conducts
C. either of these
D. neither of these

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