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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
Which of the following diode is used to derive the current in external circuit when light is incident in the circuit
Question # 2
A changing magnetic flux creates around itself
Question # 3
When the pn-junction is forward biased. the current flows through it is of the order of
Question # 4
The basic circuit element in D.C. circuit is:
Question # 5
A diode characteristic curve is a plot between
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 diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.
Question # 8
The impedance of RLC series resonance circuit at resonant frequency is
Question # 9
Which one of the following waves belongs to electromagnetic spectrum
Question # 10
The most common source of alternating voltage is:
Question # 11
The R1= infinity and R2= 0, then the gain of non-inverting amplifier is
Question # 12
In RLC series circuit, resonance occurs when
Question # 13
In describing functions of digital systems, a closed switch will be shown as
Question # 14
Which of the following diode is used for the detection of light
Question # 15
A sinusoidally alternating voltage or current can be graphically represented by a:
Prepare Complete Set Wise Physics ECAT Pre Engineering Chapter 16 Alternating Current MCQs Online With Answers
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ECAT Physics Chapter 16 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | The value of the potential difference across the depletion region for the case of germanium is |
A. 0.3 V
B. 0.5 V
C. 0.7 V
D. 0.9 V
|
| 2 | 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
|
| 3 | A sinusoidally alternating voltage or current can be graphically represented by a: |
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
|
| 4 | The power factor of resonant series circuit is |
A. 1
B. 0
C. -1
D. 0.5
|
| 5 | At resonance, the impedance of RLC series circuit is |
A. Maximum
B. Zero
C. Minimum
D. Determinate
|
| 6 | The output voltage of half wave rectification is in the form of |
A. a smooth curve
B. a smooth wave
C. pulses
D. all of the above
|
| 7 | The r.m.s. value of alternating current is equal to its maximum value at angle of |
A. 60°
B. 45°
C. 30°
D. 90°
|
| 8 | 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
|
| 9 | For a n-p-n transistor, the conventional current equation can be written as |
A. IE+ IC= IB
B. IC- IB= IE
C. IC+ IB= IE
D. IB+ IE= IC
|
| 10 | 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
|
Test Questions