ECAT Pre Computer Science Chapter 16 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 16 Alternating Current

Try The MCQ's Test For ECAT Physics Chapter 16 Alternating Current

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ECAT Physics Chapter 16 Alternating Current

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Question # 1

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

Question # 2

When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency

Question # 3

The phase at the positive peak of an A.C. cycle is:

Question # 4

Alternating current is produced by a voltage source which polarity:

Question # 5

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

Question # 6

A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at

Question # 7

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

Question # 8

A resonance curve for RLC series circuit is a plot of frequency versus

Question # 9

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

Question # 10

The input resistance of the OP-AMP is the resistance between the

Question # 11

Alternating current can be transmitted:

Question # 12

Most OP-AMP operates with

Question # 13

When the pn-junction is forward biased. the current flows through it is of the order of

Question # 14

If the value of C in a series RLC circuit is increased, the resonant frequency

Question # 15

The phase angle of a series RLC circuit at resonance is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The closed loop gain of the non-inverting amplifier is given by
A. G = R2/R1
B. G = -R2/R1
C. G = 1 - R2/R1
D. G = 1 + T2/R1
2 The value of the potential difference across the depletion region for the case of germanium is
A. 0.3 V
B. 0.5 V
C. 0.7 V
D. 0.9 V
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 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)
5 When the p-n junction is forward biased its resistance is of the order of
A. few mega ohms
B. few kilo ohms
C. few ohms
D. few milli ohms
6 The length of rotating vector (on a certain scale) represents the:
A. Peak value of alternating quantity
B. RMS value of alternating quantity
C. Instantaneous value of alternating quantity
D. Either (B) or (C)
7 Alternating current can be transmitted:
A. To long distance
B. At very high cost
C. At very low cost
D. Both (A) and (C)
8 During the positive half-cycle in the half-wave rectification,the diode
A. does not conduct
B. conducts
C. either of these
D. neither of these
9 If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
A. 353.5V
B. 250V
C. 175V
D. zero
10 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf

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  • Iiqra Fatima

    Iiqra Fatima

    25 May 2018

    You should let us practice difficult mcqs ..These are too easy for ECAT level....Thanku

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