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 time interval during which the Voltage source changes its polarity once is known as:

Question # 2

In free space, the speed of electromagnetic waves is

Question # 3

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

Question # 4

At resonance, the impedance of RLC series circuit is

Question # 5

In a normally biased n-p-n transistor, an electron c current IEflows from the

Question # 6

The phase angle of a series RLC circuit at resonance is

Question # 7

Which one of the following is correct?

Question # 8

Most OP-AMP operates with

Question # 9

The RMS value of alternating current is:

Question # 10

Average value of A.C voltage during one cycle is

Question # 11

Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is

Question # 12

If we connect a A.C. volt meter to read A.C. voltage, It would read its:

Question # 13

Which of the following diodes can operate in the reverse biased condition

Question # 14

The closed loop gain of the non-inverting amplifier is given by

Question # 15

The total reactance of a series RLC circuit at resonance is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The value of the input resistance of OP-AMP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several maga ohms
2 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
3 The output voltage of half wave rectification is in the form of
A. a smooth curve
B. a smooth wave
C. pulses
D. all of the above
4 When either L or C is increased, the resonant frequency of the RLC series circuit
A. Increases
B. Decreases
C. Remains the same
D. Becomes zero
5 Which of the following diodes can operate in the reverse biased condition
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
6 A digital system deals with quantities or variables which have
A. only one state
B. only two discrete states
C. three discrete states
D. four discrete states
7 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
8 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
9 The value of output resistance of OP-AMOP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several mega ohms
10 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant

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