ECAT Pre Engineering Physics Chapter 16 MCQ Test With Answer

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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Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Question # 1

In RLC series circuit, resonance occurs when

Question # 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

Question # 3

At resonance, the impedance of RLC series circuit is

Question # 4

In which of the following components, pn-junction is used

Question # 5

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

Question # 6

When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency

Question # 7

In a transistor, the central region is called

Question # 8

A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at

Question # 9

The wave form of alternating voltage is the graph between:

Question # 10

The value of the input resistance of OP-AMP is of the order of

Question # 11

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

Question # 12

The input resistance of the OP-AMP is the resistance between the

Question # 13

Which of the following diodes can operate in the reverse biased condition

Question # 14

For normal operation of transistor, the batteries

Question # 15

The closed loop gain of the non-inverting amplifier is given by

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
2 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these
3 The length of rotating vector (on a certain scale) represents the:
A. Peak value of alternating quantity
B. RMS value of alternating quantity
C. Instantaneous value of alternating quantity
D. Either (B) or (C)
4 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization
5 Alternating current can be transmitted:
A. To long distance
B. At very high cost
C. At very low cost
D. Both (A) and (C)
6 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
7 In a normally biased n-p-n transistor, an electron c current IEflows from the
A. emitter into the base
B. collector into the base
C. base into collector
D. none of these
8 In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them
9 To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance
A. 5.07 pF
B. 50 pF
C. 0.507 pF
D. 507 pF
10 The highest value reached by the voltage or current:
A. In quarter cycle is called Instantaneous value
B. In half cycle is called peak-to-peak value
C. In one cycle is called peak value
D. In half cycle is called Instantaneous value

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