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

The R1= infinity and R2= 0, then the gain of non-inverting amplifier is

Question # 2

The wave form of alternating voltage is the graph between:

Question # 3

Transmitting antenna emits

Question # 4

At resonance frequency the impedance of parallel resonance circuit is

Question # 5

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

Question # 6

Conversion of alternating current into direct current is called

Question # 7

To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance

Question # 8

The most common source of alternating voltage is:

Question # 9

The device which allows only the flow of an A.C. through a circuit is

Question # 10

In a transistor, if the central region is n-type, then this type of transistor is known as

Question # 11

OP-AMP has the following input terminals

Question # 12

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

Question # 13

The average of A.C. current and voltage over a complete cycle is

Question # 14

The basic circuit elements of A.C circuit are

Question # 15

SI unit of impedance is

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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 The alternative voltage of current is actually measured by:
A. Its RMS value
B. Square root of its mean square value
C. Instantaneous value
D. Peak value
3 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
4 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
5 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
6 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
7 In n-p-n transistor, emitter base junction is kept
A. reversed
B. forward biased
C. may be reversed or may be forward biased
D. none of these
8 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization
9 The phase angle of a series RLC circuit at resonance is
A. 180°
B. 90°
C. 0°
D. None of the these
10 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

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