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

Question # 2

The value of the potential difference across the depletion region for the case of germanium is

Question # 3

At resonance frequency the impedance of parallel resonance circuit is

Question # 4

Peak value of alternative current is:

Question # 5

SI unit of impedance is

Question # 6

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

Question # 7

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

Question # 8

The alternative voltage of current is actually measured by:

Question # 9

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

Question # 10

Which of the following diodes can operate in the reverse biased condition

Question # 11

When a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the

Question # 12

In half wave rectification

Question # 13

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

Question # 14

Transmitting antenna emits

Question # 15

The impedance of RLC series resonance circuit at resonant frequency is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Alternating current can induce voltage because it has a
A. High peak value
B. Varying magnetic field
C. Stronger field than direct curren
D. Constant magnetic field
2 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
3 Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is
A. zero
B. small
C. large
D. very large
4 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
5 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
6 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
7 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
8 In RLC series circuit, resonance occurs when
A. XL > Xc
B. XL < Xc
C. XL = Xc
D. None of these
9 The value of output resistance of OP-AMOP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several mega ohms
10 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

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