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

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

Question # 2

When the emitter-base junction of a transistor is reverse biased, collector current

Question # 3

Chock consumes externally small

Question # 4

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

Question # 5

In an A.C circuit with resistor only, the current and voltage have a phase angle of

Question # 6

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

Question # 7

The open loop gain of OP-AMP is of the order of

Question # 8

At resonance, the phase angle for RLC series resonance circuit equals

Question # 9

OP-AMP has the following input terminals

Question # 10

The Instantaneous value of alternative current maybe:

Question # 11

The basic circuit element in D.C. circuit is:

Question # 12

The amplifier which us used to perform mathematical operations electronically is known as

Question # 13

The total reactance of a series RLC circuit at resonance is

Question # 14

The r.m.s. value of alternating current is equal to its maximum value at angle of

Question # 15

When the pn-junction is in reversed biased, current flows through the junction due to the

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 The closed loop gain of the inverting amplifier is written as
A. G = R2/R1
B. G = 1 + R2/R1
C. G = -R2/R1
D. G = 1 - R2/R1
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 If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
A. 353.5V
B. 250V
C. 175V
D. zero
5 For normal operation of transistor, the batteries
A. VCCis of much lower value than VBB
B. VCCis of much higher value than VBB
C. VCC is equal toVBB
D. none of these
6 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
7 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
8 When the pn-junction is forward biased. the current flows through it is of the order of
A. mili-amperes
B. amperes
C. nano-amperes
D. micro-amperes
9 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
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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  • 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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