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

In an A.C circuit with resistor only, the current and voltage have a phase angle of

Question # 2

At resonance, the impedance of RLC series circuit is

Question # 3

OP-AMP has the following input terminals

Question # 4

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

Question # 5

An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current

Question # 6

Alternating current can be transmitted:

Question # 7

The basic circuit elements of A.C circuit are

Question # 8

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

Question # 9

The sum of positive and negative peak values is called:

Question # 10

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

Question # 11

The value of the input resistance of OP-AMP is of the order of

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

A resonance curve for RLC series circuit is a plot of frequency versus

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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 If we connect a A.C. volt meter to read A.C. voltage, It would read its:
A. RMS value
B. Instantaneous value
C. Valued average over a cycle
D. Zero
3 The value of the potential difference across the depletion region for the case of germanium is
A. 0.3 V
B. 0.5 V
C. 0.7 V
D. 0.9 V
4 The value of current gain of n-p-n transistor is of the order of
A. tens
B. hundreds
C. thousands
D. ten thousands
5 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
6 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive
7 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
8 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)
9 The input resistance of the OP-AMP is the resistance between the
A. (-) input and output
B. (+) input and output
C. (-) and (+) inputs
D. between any inputs
10 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three

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