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

At resonance frequency the impedance of parallel resonance circuit is

Question # 2

In RLC series circuit, resonance occurs when

Question # 3

The most common source of alternating voltage is:

Question # 4

If we connect a A.C. volt meter to read A.C. voltage, It would read its:

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

The time interval during which the Voltage source changes its polarity once is known as:

Question # 9

During the positive half-cycle in the half-wave rectification,the diode

Question # 10

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

Question # 11

The value of output resistance of OP-AMOP is of the order of

Question # 12

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

Question # 13

Which of the following diode is used for the detection of light

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive
2 The circuit which is used to smooth the output voltage of the full-wave rectification is known as
A. transformer
B. rectifier
C. filter
D. none of these
3 The average of A.C. current and voltage over a complete cycle is
A. Maximum
B. zero
C. Neither zero nor maximum
D. None of these
4 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization
5 The output voltage of half wave rectification is in the form of
A. a smooth curve
B. a smooth wave
C. pulses
D. all of the above
6 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
7 The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its
A. Icwill decrease
B. VCEwill increase
C. ICwill increase
D. VCCwill increase
8 When a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the
A. base and emitter
B. collector and emitter
C. base and collector
D. any one of these
9 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three
10 The basic circuit element in A.C. circuits are:
A. Resistor and capacitor
B. Resistor and Inductor
C. Capacitor only
D. Both (B) and (C)

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