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

A signal is amplified at the output without any change of phase, if it is applied at the

Question # 2

An A.C varies as a function of

Question # 3

The amplifier which us used to perform mathematical operations electronically is known as

Question # 4

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 # 5

At higher frequency of the alternating current, the capacitive reactance Xc

Question # 6

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

Question # 7

The value of current gain of n-p-n transistor is of the order of

Question # 8

The closed loop gain of the inverting amplifier is written as

Question # 9

The total reactance of a series RLC circuit at resonance is

Question # 10

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

Question # 11

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

Question # 12

A changing magnetic flux creates around itself

Question # 13

OP-AMP has the following input terminals

Question # 14

For a n-p-n transistor, the conventional current equation can be written as

Question # 15

At resonance, the impedance of RLC series circuit is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
2 If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
A. 353.5V
B. 250V
C. 175V
D. zero
3 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
4 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
5 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
6 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
7 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential
8 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
9 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
10 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

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