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 r.m.s. value of alternating current is equal to its maximum value at angle of

Question # 2

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

Question # 3

If 250V is the RMS value of alternative voltage, then its peak value Vowill be:

Question # 4

The basic circuit element in A.C. circuits are:

Question # 5

The sum of positive and negative peak values is called:

Question # 6

The closed loop gain of the inverting amplifier is written as

Question # 7

Alternating current can induce voltage because it has a

Question # 8

Which one of the following is correct?

Question # 9

In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.

Question # 10

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

Question # 11

OP-AMP has the following input terminals

Question # 12

At resonance, the phase angle for RLC series resonance circuit equals

Question # 13

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

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The amplifier which us used to perform mathematical operations electronically is known as
A. calculator
B. OP-AMP
C. computer
D. any one of them
2 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
3 Alternating current can be transmitted:
A. To long distance
B. At very high cost
C. At very low cost
D. Both (A) and (C)
4 Alternating current is produced by a voltage source which polarity:
A. Remains the same
B. Reverse after period T
C. Keeps on reversing with time
D. Reverse after every time interval T/2
5 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
6 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
7 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
8 Transmitting antenna emits
A. Magnetic waves
B. Electric waves
C. Electromagnetic waves
D. Sound waves
9 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
10 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

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