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

Which one of the following waves belongs to electromagnetic spectrum

Question # 2

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

Question # 3

In a transistor, the central region is called

Question # 4

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

Question # 5

The length of rotating vector (on a certain scale) represents the:

Question # 6

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

Question # 7

For normal operation of transistor, the batteries

Question # 8

The phase at the positive peak of an A.C. cycle is:

Question # 9

When the pn-junction is forward biased. the current flows through it is of the order of

Question # 10

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

Question # 11

The total reactance of a series RLC circuit at resonance is

Question # 12

The Instantaneous value of alternative current maybe:

Question # 13

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

Question # 14

A changing magnetic flux creates around itself

Question # 15

Which of the following has a great concentration of impurity

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 The amplifier which us used to perform mathematical operations electronically is known as
A. calculator
B. OP-AMP
C. computer
D. any one of them
3 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
4 A signal is amplified at the output without any change of phase, if it is applied at the
A. inverting input
B. non-inverting input
C. at any of the input
D. none of these
5 In RLC series circuit, resonance occurs when
A. XL > Xc
B. XL < Xc
C. XL = Xc
D. None of these
6 During the positive half-cycle in the half-wave rectification,the diode
A. does not conduct
B. conducts
C. either of these
D. neither of these
7 At resonance, the impedance of RLC series circuit is
A. Maximum
B. Zero
C. Minimum
D. Determinate
8 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
9 In an A.C circuit with resistor only, the current and voltage have a phase angle of
A. 90°
B. 0°
C. 180°
D. none of these
10 During the negative half-cycle of the half-wave rectification, the diode
A. does not conduct
B. conducts
C. either of these
D. none of these

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