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

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

Question # 3

Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length

Question # 4

Chock consumes externally small

Question # 5

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

Question # 6

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 # 7

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

Question # 8

The total reactance of a series RLC circuit at resonance is

Question # 9

Mathematical manipulation of the two quantized states can be best carried if they are represented by

Question # 10

At resonance frequency the impedance of parallel resonance circuit is

Question # 11

The Instantaneous value of alternative current maybe:

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 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
4 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
5 In which of the following components, pn-junction is used
A. light emitting diode
B. photo diode
C. photo voltaic cell
D. all of these
6 Which of the following diode is used for the detection of light
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them
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 amplifier which us used to perform mathematical operations electronically is known as
A. calculator
B. OP-AMP
C. computer
D. any one of them
9 If the value of C in a series RLC circuit is increased, the resonant frequency
A. Is not affected
B. Increase
C. Remains the same
D. Decreases
10 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

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