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

A P-N juction or semiconductor diode cannot be used as

Question # 2

The waveform of alternating voltage is a:

Question # 3

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

Question # 4

A diode characteristic curve is a plot between

Question # 5

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

Question # 6

In frequency modulation (FM), the carrier waves amplitude

Question # 7

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

Question # 8

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

Question # 9

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

Question # 10

Most OP-AMP operates with

Question # 11

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

Question # 12

At resonance frequency the impedance of parallel resonance circuit is

Question # 13

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

Question # 14

Which one of the following is correct?

Question # 15

In free space, the speed of electromagnetic waves is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
2 Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length
A. X-rays
B. Ultraviolet rays
C. y-rays
D. Cosmic rays
3 At resonance, the impedance of RLC series circuit is
A. Maximum
B. Zero
C. Minimum
D. Determinate
4 In describing functions of digital systems, a closed switch will be shown as
A. 0
B. 1
C. low
D. any one of these
5 Which of the following diodes can operate in the reverse biased condition
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
6 The alternative voltage of current is actually measured by:
A. Its RMS value
B. Square root of its mean square value
C. Instantaneous value
D. Peak value
7 Alternating current can be transmitted:
A. To long distance
B. At very high cost
C. At very low cost
D. Both (A) and (C)
8 Alternating current is produced by a voltage source which polarity:
A. Remains the same
B. Reverse after period T
C. Keeps on reversing with time
D. Reverse after every time interval T/2
9 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
10 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

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