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 n-p-n transistor, emitter base junction is kept

Question # 2

For normal operation of transistor, the batteries

Question # 3

A P-N juction or semiconductor diode cannot be used as

Question # 4

The highest value reached by the voltage or current:

Question # 5

The basic circuit elements of A.C circuit are

Question # 6

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

Question # 7

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

Question # 8

The value of the input resistance of OP-AMP is of the order of

Question # 9

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

Question # 10

The most common source of alternating voltage is:

Question # 11

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

Question # 12

In describing functions of digital systems, a closed switch will be shown as

Question # 13

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

Question # 14

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

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 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
2 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential
3 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
4 The value of current gain of n-p-n transistor is of the order of
A. tens
B. hundreds
C. thousands
D. ten thousands
5 The closed loop gain of the inverting amplifier is written as
A. G = R2/R1
B. G = 1 + R2/R1
C. G = -R2/R1
D. G = 1 - R2/R1
6 If we connected the ordinary DC ammeter to measure alternating current, it would measure its:
A. Instantaneous value
B. RMS value
C. Value averaged over a cycle
D. Either (B) or (C)
7 The length of rotating vector (on a certain scale) represents the:
A. Peak value of alternating quantity
B. RMS value of alternating quantity
C. Instantaneous value of alternating quantity
D. Either (B) or (C)
8 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
9 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these
10 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

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