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

Question # 2

The most common source of alternating voltage is:

Question # 3

The device which allows only the flow of an A.C. through a circuit is

Question # 4

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

Question # 5

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

Question # 6

The R1= infinity and R2= 0, then the gain of non-inverting amplifier is

Question # 7

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

Question # 8

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

Question # 9

Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length

Question # 10

The highest value reached by the voltage or current:

Question # 11

Electromagnetic waves transmit energy equal to

Question # 12

During the negative half-cycle of the half-wave rectification, the diode

Question # 13

Which one of the following is correct?

Question # 14

In free space, the speed of electromagnetic waves is

Question # 15

When the p-n junction is forward biased its resistance is of the order of

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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 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
3 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three
4 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
5 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
6 During each cycle, alternating voltage reaches a peak value
A. One time
B. Two times
C. Four times
D. A number of times depending on the frequency
7 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
8 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
9 For a n-p-n transistor, the conventional current equation can be written as
A. IE+ IC= IB
B. IC- IB= IE
C. IC+ IB= IE
D. IB+ IE= IC
10 At resonance, the impedance of RLC series circuit is
A. Maximum
B. Zero
C. Minimum
D. Determinate

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