ECAT Pre Computer Science Chapter 16 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 16 Alternating Current

Try The MCQ's Test For ECAT Physics Chapter 16 Alternating Current

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ECAT Physics Chapter 16 Alternating Current

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Question # 1

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

Question # 2

When either L or C is increased, the resonant frequency of the RLC series circuit

Question # 3

Peak value of alternative current is:

Question # 4

A sinusoidally alternating voltage or current can be graphically represented by a:

Question # 5

When the pn-junction is connected reversed biased, its resistance is of the order of

Question # 6

Alternating current is produced by a voltage source which polarity:

Question # 7

In frequency modulation (FM), the carrier waves amplitude

Question # 8

In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.

Question # 9

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

Question # 10

The waveform of alternating voltage is a:

Question # 11

Nowadays, Most of the electric energy is produced by the A.C. generators using:

Question # 12

A resonance curve for RLC series circuit is a plot of frequency versus

Question # 13

In a normally biased n-p-n transistor, an electron c current IEflows from the

Question # 14

The power factor of resonant series circuit is

Question # 15

If 250V is the RMS value of alternative voltage, then its peak value Vowill be:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 In a transistor, if the central region is p-type then this type of transistor is known as
A. p-n-p transistor
B. n-p-n transistor
C. either of these
D. none of these
2 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
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 A diode characteristic curve is a plot between
A. current and time
B. voltage and time
C. voltage and current
D. forward voltage and reversed voltage
5 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
6 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
7 Which of the following diode is used for the detection of light
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them
8 The wave form of alternating voltage is the graph between:
A. Voltage across X-axis and time across y-axis
B. Current and time
C. Voltage along y-axis and time along x-axis
D. Voltage and current
9 When the pn-junction is in reversed biased, current flows through the junction due to the
A. majority carriers
B. minority carriers
C. either of them
D. none of them
10 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

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  • Iiqra Fatima

    Iiqra Fatima

    25 May 2018

    You should let us practice difficult mcqs ..These are too easy for ECAT level....Thanku

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