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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
In an A.C circuit with resistor only, the current and voltage have a phase angle of
Question # 2
The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its
Question # 3
The Instantaneous value of alternative current maybe:
Question # 4
The waveform of alternating voltage is a:
Question # 5
The bridge circuit of full wave rectification uses
Question # 6
During the negative half-cycle of the half-wave rectification, the diode
Question # 7
Average value of A.C voltage during one cycle is
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 average of A.C. current and voltage over a complete cycle is
Question # 10
Which of the following diode is used for the detection of light
Question # 11
In half wave rectification
Question # 12
To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance
Question # 13
The RMS value of alternating current is:
Question # 14
Alternating current can be transmitted:
Question # 15
When the emitter-base junction of a transistor is reverse biased, collector current
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ECAT Physics Chapter 16 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | Which of the following has a great concentration of impurity |
A. base
B. emitter
C. collector
D. none of these
|
| 2 | 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
|
| 3 | If 250V is the RMS value of alternative voltage, then its peak value Vowill be: |
A. 353.5V
B. 250V
C. 175V
D. zero
|
| 4 | 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
|
| 5 | The device which allows only the flow of an A.C. through a circuit is |
A. Capacitor
B. Inductor
C. D.C. motor
D. Battery
|
| 6 | In free space, the speed of electromagnetic waves is |
A. 3 x 108ms-1
B. 3 x 106ms-1
C. 4 x 107ms-1
D. 3 x 109ms-1
|
| 7 | A sinusoidally alternating voltage or current can be graphically represented by a: |
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
|
| 8 | The power factor of resonant series circuit is |
A. 1
B. 0
C. -1
D. 0.5
|
| 9 | The basic circuit element in A.C. circuits are: |
A. Resistor and capacitor
B. Resistor and Inductor
C. Capacitor only
D. Both (B) and (C)
|
| 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