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

In n-p-n transistor, emitter base junction is kept

Question # 2

For the normal operation of the transistor, its

Question # 3

Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is

Question # 4

A diode characteristic curve is a plot between

Question # 5

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

Question # 6

The value of the potential difference across the depletion region for the case of germanium is

Question # 7

The output voltage of half wave rectification is in the form of

Question # 8

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

Question # 9

Which of the following has a great concentration of impurity

Question # 10

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

Question # 11

Alternating current is produced by a voltage source which polarity:

Question # 12

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

Question # 13

A signal is amplified at the output without any change of phase, if it is applied at the

Question # 14

For a n-p-n transistor, the conventional current equation can be written as

Question # 15

An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 For the normal operation of the transistor, its
A. emitter-base and collector base junctions are forward biased
B. emitter-base junction is reversed biased and collector base junction is forward biased
C. emitter-base junction is forward biased and collector-base junction is reverse biased
D. any one of these
2 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
3 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
4 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
5 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
6 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
7 At resonance, the impedance of RLC series circuit is
A. Maximum
B. Zero
C. Minimum
D. Determinate
8 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
9 When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency
A. 9.4 kHz
B. 940 kHz
C. 94 kHz
D. None of these
10 Which one of the following waves belongs to electromagnetic spectrum
A. Radio and TV waves
B. Radar waves
C. Micro waves
D. All of them

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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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