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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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Total Questions15
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Time Allowed20
ECAT Physics Chapter 16 Alternating Current
00:00
Question # 1
A P-N juction or semiconductor diode cannot be used as
Question # 2
A changing magnetic flux creates around itself
Question # 3
At resonance, the phase angle for RLC series resonance circuit equals
Question # 4
When the emitter-base junction of a transistor is reverse biased, collector current
Question # 5
For a n-p-n transistor, the conventional current equation can be written as
Question # 6
The phase at the positive peak of an A.C. cycle is:
Question # 7
In describing functions of digital systems, a closed switch will be shown as
Question # 8
Nowadays, Most of the electric energy is produced by the A.C. generators using:
Question # 9
A sinusoidally alternating voltage or current can be graphically represented by a:
Question # 10
Chock consumes externally small
Question # 11
The impedance of RLC series resonance circuit at resonant frequency is
Question # 12
The highest value reached by the voltage or current:
Question # 13
Which of the following has a great concentration of impurity
Question # 14
A resonance curve for RLC series circuit is a plot of frequency versus
Question # 15
Conversion of alternating current into direct current is called
Top Scorers Of ECAT Physics Chapter 16 Alternating Current MCQ`s Test
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S Sana Hashim 20 - May - 2022 00 Min 05 Sec 60/60 -
A Anayat Ali 26 - Mar - 2024 00 Min 06 Sec 60/60 -
H Heer 02 - Jan - 2024 00 Min 42 Sec 60/60 -
Q Qura-tul-Ain Ansari 13 - Mar - 2023 06 Min 42 Sec 60/60 -
A Abdullah Baloch 02 - Aug - 2024 02 Min 33 Sec 55/60 -
A Alishba Farooq 09 - Mar - 2024 16 Min 16 Sec 55/60 -
D dark goblin 19 - Jul - 2024 00 Min 39 Sec 50/60 -
M Muhammad Rizwan 11 - Jul - 2022 02 Min 39 Sec 45/60 -
S Sarmad 18 - Jun - 2022 07 Min 03 Sec 45/60 -
H HAMZA Shah 20 - Sep - 2021 01 Min 11 Sec 40/60 -
M Muqadas Zahra 13 - Apr - 2022 14 Min 05 Sec 40/60 -
S Shaeel Fatima 24 - Feb - 2023 01 Min 10 Sec 35/60 -
T tehreemnadeem 11 - Jul - 2022 04 Min 13 Sec 35/60 -
M Muhammad Muzammil 11 - Mar - 2024 02 Min 14 Sec 30/60 -
M musman shahid 03 - Jun - 2024 02 Min 53 Sec 30/60
ECAT Physics Chapter 16 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current |
A. Decreases
B. Increases
C. Does not change
D. Momentarily goes to zero
|
| 2 | Which of the following diode is used to derive the current in external circuit when light is incident in the circuit |
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
|
| 3 | 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
|
| 4 | 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 |
A. 2nd group
B. fourth group
C. fifth group
D. sixth group
|
| 5 | If the value of C in a series RLC circuit is increased, the resonant frequency |
A. Is not affected
B. Increase
C. Remains the same
D. Decreases
|
| 6 | 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
|
| 7 | A P-N juction or semiconductor diode cannot be used as |
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
|
| 8 | The power factor of resonant series circuit is |
A. 1
B. 0
C. -1
D. 0.5
|
| 9 | In which of the following components, pn-junction is used |
A. light emitting diode
B. photo diode
C. photo voltaic cell
D. all of these
|
| 10 | The Instantaneous value of alternative current maybe: |
A. The same as its RMS value
B. Greater than its Rms value
C. The same as its peak value
D. Any of these
|
Test Questions
Share your comments & questions here
Iiqra Fatima
25 May 2018You should let us practice difficult mcqs ..These are too easy for ECAT level....Thanku