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 Instantaneous value of alternative current maybe:

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

In series RC circuit when R=Xc, then the phase angle is

Question # 9

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

Question # 10

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

Question # 11

At resonance, the impedance of RLC series circuit is

Question # 12

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

Question # 13

The basic circuit elements of A.C circuit are

Question # 14

Conversion of alternating current into direct current is called

Question # 15

Average value of A.C voltage during one cycle is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 The device which allows only the flow of an A.C. through a circuit is
A. Capacitor
B. Inductor
C. D.C. motor
D. Battery
3 A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at
A. inverting input
B. non-inverting input
C. any one of the input terminal
D. none of them
4 A changing magnetic flux creates around itself
A. An electromotive force
B. An electric field (changing electric flux)
C. Magnetic field
D. None of the above
5 In which of the following components, pn-junction is used
A. light emitting diode
B. photo diode
C. photo voltaic cell
D. all of these
6 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
7 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
8 The closed loop gain of the non-inverting amplifier is given by
A. G = R2/R1
B. G = -R2/R1
C. G = 1 - R2/R1
D. G = 1 + T2/R1
9 The R1= infinity and R2= 0, then the gain of non-inverting amplifier is
A. zero
B. infinity
C. one
D. any one of these
10 In RLC series circuit, resonance occurs when
A. XL > Xc
B. XL < Xc
C. XL = Xc
D. None of these

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