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

The phase angle of a series RLC circuit at resonance is

Question # 2

Peak value of alternative current is:

Question # 3

Alternating current can be transmitted:

Question # 4

Which one of the following waves belongs to electromagnetic spectrum

Question # 5

The Instantaneous value of alternative current maybe:

Question # 6

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

Question # 7

The sum of positive and negative peak values is called:

Question # 8

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

Question # 9

To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance

Question # 10

Nowadays, Most of the electric energy is produced by the A.C. generators using:

Question # 11

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

Question # 12

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

Question # 13

When the p-n junction is forward biased its resistance is of the order of

Question # 14

During each cycle, alternating voltage reaches a peak value

Question # 15

Which of the following diode is used for the detection of light

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 At resonance, the phase angle for RLC series resonance circuit equals
A. 0°
B. 90°
C. 180°
D. 270°
2 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant
3 The wave form of alternating voltage is the graph between:
A. Voltage across X-axis and time across y-axis
B. Current and time
C. Voltage along y-axis and time along x-axis
D. Voltage and current
4 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
5 Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is
A. zero
B. small
C. large
D. very large
6 The input resistance of the OP-AMP is the resistance between the
A. (-) input and output
B. (+) input and output
C. (-) and (+) inputs
D. between any inputs
7 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive
8 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
9 Nowadays, Most of the electric energy is produced by the A.C. generators using:
A. Hydal water
B. Geothermal energy
C. Solar energy
D. Biomass
10 Which one of the following is correct?
A. Vo= 1.414 Vrms
B. Iams= 1.414 Io
C. VO = 10.70 Vrms
D. Both a and b

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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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