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

In free space, the speed of electromagnetic waves is

Question # 3

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

Question # 4

The magnitude of alternative voltage V:

Question # 5

In describing functions of digital systems, a closed switch will be shown as

Question # 6

Which of the following has a great concentration of impurity

Question # 7

The average of A.C. current and voltage over a complete cycle is

Question # 8

The phase angle of a series RLC circuit at resonance is

Question # 9

OP-AMP has the following input terminals

Question # 10

When a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the

Question # 11

In a transistor, if the central region is n-type, then this type of transistor is known as

Question # 12

In which of the following components, pn-junction is used

Question # 13

During each cycle, alternating voltage reaches a peak value

Question # 14

For normal operation of transistor, the batteries

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 A signal is amplified at the output without any change of phase, if it is applied at the
A. inverting input
B. non-inverting input
C. at any of the input
D. none of these
2 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
3 The alternative voltage of current is actually measured by:
A. Its RMS value
B. Square root of its mean square value
C. Instantaneous value
D. Peak value
4 Most OP-AMP operates with
A. + 6 V supply
B. + 10 V supply
C. + 12 V supply
D. + 24 V supply
5 If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
A. 353.5V
B. 250V
C. 175V
D. zero
6 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
7 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
8 Alternating current can be transmitted:
A. To long distance
B. At very high cost
C. At very low cost
D. Both (A) and (C)
9 Average value of A.C voltage during one cycle is
A. 1
B. Zero
C. Maximum
D. Variable
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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  • 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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