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MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current
Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current
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Total Questions15
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Time Allowed20
Physics ECAT Pre Engineering Chapter 16 Alternating Current
00:00
Question # 1
The circuit which is used to smooth the output voltage of the full-wave rectification is known as
Question # 2
The phase angle of a series RLC circuit at resonance is
Question # 3
During the negative half-cycle of the half-wave rectification, the diode
Question # 4
At resonance frequency the impedance of parallel resonance circuit is
Question # 5
In frequency modulation (FM), the carrier waves amplitude
Question # 6
The RMS value of alternating current is:
Question # 7
When the pn-junction is in reversed biased, current flows through the junction due to the
Question # 8
Which of the following diode is used for the detection of light
Question # 9
If the value of C in a series RLC circuit is increased, the resonant frequency
Question # 10
During each cycle, alternating voltage reaches a peak value
Question # 11
A digital system deals with quantities or variables which have
Question # 12
Which one of the following waves belongs to electromagnetic spectrum
Question # 13
In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.
Question # 14
The Instantaneous value of alternative current maybe:
Question # 15
During the positive half-cycle in the half-wave rectification,the diode
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ECAT Physics Chapter 16 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | In a transistor, the central region is called |
A. collector
B. emitter
C. base
D. none of them
|
| 2 | 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
|
| 3 | When the emitter-base junction of a transistor is reverse biased, collector current |
A. Reverses
B. Increases
C. Decreases
D. Stops
|
| 4 | In half wave rectification |
A. both halves of the input voltage is used
B. only one half of the input voltage is used
C. either of these
D. none of these
|
| 5 | Transmitting antenna emits |
A. Magnetic waves
B. Electric waves
C. Electromagnetic waves
D. Sound waves
|
| 6 | The average of A.C. current and voltage over a complete cycle is |
A. Maximum
B. zero
C. Neither zero nor maximum
D. None of these
|
| 7 | Most OP-AMP operates with |
A. + 6 V supply
B. + 10 V supply
C. + 12 V supply
D. + 24 V supply
|
| 8 | 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
|
| 9 | An A.C varies as a function of |
A. Current
B. Voltage
C. Time
D. Charge
|
| 10 | 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
|
Test Questions