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

In an A.C circuit with resistor only, the current and voltage have a phase angle of

Question # 2

The most common source of alternating voltage is:

Question # 3

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

Question # 4

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

Question # 5

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

Question # 6

A sinusoidally alternating voltage or current can be graphically represented by a:

Question # 7

When either L or C is increased, the resonant frequency of the RLC series circuit

Question # 8

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 # 9

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

Question # 10

Which one of the following waves belongs to electromagnetic spectrum

Question # 11

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

Question # 12

The phase angle of a series RLC circuit at resonance is

Question # 13

During each cycle, alternating voltage reaches a peak value

Question # 14

The impedance of RLC series resonance circuit at resonant frequency is

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Most OP-AMP operates with
A. + 6 V supply
B. + 10 V supply
C. + 12 V supply
D. + 24 V supply
2 An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is
A. 3525.0 volts
B. 35.35 volts
C. 353.5 volts
D. 3.535 volts
3 Transmitting antenna emits
A. Magnetic waves
B. Electric waves
C. Electromagnetic waves
D. Sound waves
4 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
A. base and emitter
B. collector and emitter
C. base and collector
D. any one of these
5 When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency
A. 9.4 kHz
B. 940 kHz
C. 94 kHz
D. None of these
6 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
7 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
8 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
9 Average value of A.C voltage during one cycle is
A. 1
B. Zero
C. Maximum
D. Variable
10 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

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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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