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 frequency modulation (FM), the carrier waves amplitude

Question # 2

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

Question # 3

At resonance, the impedance of RLC series circuit is

Question # 4

For the normal operation of the transistor, its

Question # 5

The open loop gain of OP-AMP is of the order of

Question # 6

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 # 7

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

Question # 8

The phase angle of a series RLC circuit at resonance is

Question # 9

The time interval during which the Voltage source changes its polarity once is known as:

Question # 10

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

Question # 11

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

Question # 12

The waveform of alternating voltage is a:

Question # 13

The sum of positive and negative peak values is called:

Question # 14

The Instantaneous value of alternative current maybe:

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 A changing magnetic flux creates around itself
A. An electromotive force
B. An electric field (changing electric flux)
C. Magnetic field
D. None of the above
2 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
3 Which one of the following waves belongs to electromagnetic spectrum
A. Radio and TV waves
B. Radar waves
C. Micro waves
D. All of them
4 The value of the input resistance of OP-AMP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several maga ohms
5 The impedance of RLC series resonance circuit at resonant frequency is
A. Greater than R
B. Equal to R
C. Less than R
D. None of these
6 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant
7 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
8 Alternating current can induce voltage because it has a
A. High peak value
B. Varying magnetic field
C. Stronger field than direct curren
D. Constant magnetic field
9 In an A.C circuit with resistor only, the current and voltage have a phase angle of
A. 90°
B. 0°
C. 180°
D. none of these
10 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value

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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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