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 closed loop gain of the inverting amplifier is written as

Question # 2

Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:

Question # 3

At resonance, the impedance of RLC series circuit is

Question # 4

When the p-n junction is forward biased its resistance is of the order of

Question # 5

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

Question # 6

During each cycle, alternating voltage reaches a peak value

Question # 7

For a n-p-n transistor, the conventional current equation can be written as

Question # 8

The value of current gain of n-p-n transistor is of the order of

Question # 9

The amplifier which us used to perform mathematical operations electronically is known as

Question # 10

Nowadays, Most of the electric energy is produced by the A.C. generators using:

Question # 11

Which of the following diode is used for the detection of light

Question # 12

In frequency modulation (FM), the carrier waves amplitude

Question # 13

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

Question # 14

Average value of A.C voltage during one cycle is

Question # 15

Peak value of alternative current is:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 A diode characteristic curve is a plot between
A. current and time
B. voltage and time
C. voltage and current
D. forward voltage and reversed voltage
2 The entire wave form of sinusoidal voltage is actually a set of all the:
A. Positive maximum value + Voand negative maximum value -Vo
B. Posiotive maximum value +Vo and zero
C. Zero and negative maximum value -Vo
D. Any of these
3 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)
4 Nowadays, Most of the electric energy is produced by the A.C. generators using:
A. Hydal water
B. Geothermal energy
C. Solar energy
D. Biomass
5 An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current
A. Decreases
B. Increases
C. Does not change
D. Momentarily goes to zero
6 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive
7 The RMS value of alternating current is:
A. 0.7 times at the peak value
B. 0.5 times the peak value
C. 0.7 times the Instantaneous value
D. Equal to maximum voltage
8 The impedance of RLC series resonance circuit at resonant frequency is
A. Greater than R
B. Equal to R
C. Less than R
D. None of these
9 When the p-n junction is forward biased its resistance is of the order of
A. few mega ohms
B. few kilo ohms
C. few ohms
D. few milli ohms
10 In free space, the speed of electromagnetic waves is
A. 3 x 108ms-1
B. 3 x 106ms-1
C. 4 x 107ms-1
D. 3 x 109ms-1

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