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 alternative voltage of current is actually measured by:

Question # 2

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

Question # 3

Peak value of alternative current is:

Question # 4

Which of the following has a great concentration of impurity

Question # 5

In RLC series circuit, resonance occurs when

Question # 6

OP-AMP has the following input terminals

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

The power factor of resonant series circuit is

Question # 11

Alternating current is produced by a voltage source which polarity:

Question # 12

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

Question # 13

The closed loop gain of the inverting amplifier is written as

Question # 14

A changing magnetic flux creates around itself

Question # 15

Electromagnetic waves transmit energy equal to

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The basic circuit element in A.C. circuits are:
A. Resistor and capacitor
B. Resistor and Inductor
C. Capacitor only
D. Both (B) and (C)
2 A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at
A. inverting input
B. non-inverting input
C. any one of the input terminal
D. none of them
3 For normal operation of transistor, the batteries
A. VCCis of much lower value than VBB
B. VCCis of much higher value than VBB
C. VCC is equal toVBB
D. none of these
4 If we connected the ordinary DC ammeter to measure alternating current, it would measure its:
A. Instantaneous value
B. RMS value
C. Value averaged over a cycle
D. Either (B) or (C)
5 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
6 When the emitter-base junction of a transistor is reverse biased, collector current
A. Reverses
B. Increases
C. Decreases
D. Stops
7 The time interval during which the Voltage source changes its polarity once is known as:
A. Time period T
B. Half the time period
C. Quarter the time period
D. Two third of the time period
8 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
9 In a transistor, if the central region is p-type then this type of transistor is known as
A. p-n-p transistor
B. n-p-n transistor
C. either of these
D. none of these
10 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

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