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

Alternating current can be transmitted:

Question # 2

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

Question # 3

The basic circuit elements of A.C circuit are

Question # 4

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

Question # 5

The power factor of resonant series circuit is

Question # 6

During each cycle, alternating voltage reaches a peak value

Question # 7

Chock consumes externally small

Question # 8

A digital system deals with quantities or variables which have

Question # 9

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

Question # 10

In a transistor, the central region is called

Question # 11

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

Question # 12

In frequency modulation (FM), the carrier waves amplitude

Question # 13

When either L or C is increased, the resonant frequency of the RLC series circuit

Question # 14

The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 In frequency modulation (FM), the carrier waves amplitude
A. Remains constant
B. Increase
C. Decreases
D. None of these
2 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
3 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential
4 Most OP-AMP operates with
A. + 6 V supply
B. + 10 V supply
C. + 12 V supply
D. + 24 V supply
5 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
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 Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is
A. zero
B. small
C. large
D. very large
8 Alternating current can be transmitted:
A. To long distance
B. At very high cost
C. At very low cost
D. Both (A) and (C)
9 Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:
A. Peak value
B. RMS value
C. Instantaneous value
D. Peak-to-peak value
10 When the pn-junction is connected reversed biased, its resistance is of the order of
A. few ohms
B. few kilo-ohms
C. few mega-ohms
D. few mili-ohms

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