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 average of A.C. current and voltage over a complete cycle is

Question # 2

OP-AMP has the following input terminals

Question # 3

The waveform of alternating voltage is a:

Question # 4

A diode characteristic curve is a plot between

Question # 5

The bridge circuit of full wave rectification uses

Question # 6

The alternative voltage of current is actually measured by:

Question # 7

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

Question # 8

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 # 9

The amplifier which us used to perform mathematical operations electronically is known as

Question # 10

To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance

Question # 11

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

Question # 12

When either L or C is increased, the resonant frequency of the RLC series circuit

Question # 13

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

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
4 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
A. base and emitter
B. collector and emitter
C. base and collector
D. any one of these
5 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
6 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
7 Nowadays, Most of the electric energy is produced by the A.C. generators using:
A. Hydal water
B. Geothermal energy
C. Solar energy
D. Biomass
8 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
9 The time interval during which the Voltage source changes its polarity once is known as:
A. Time period T
B. Half the time period
C. Quarter the time period
D. Two third of the time period
10 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

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