ECAT Pre Computer Science Chapter 16 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 16 Alternating Current

Try The MCQ's Test For ECAT Physics Chapter 16 Alternating Current

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ECAT Physics Chapter 16 Alternating Current

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Question # 1

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

Question # 2

Which of the following has a great concentration of impurity

Question # 3

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 # 4

Peak value of alternative current is:

Question # 5

The highest value reached by the voltage or current:

Question # 6

The input resistance of the OP-AMP is the resistance between the

Question # 7

If 250V is the RMS value of alternative voltage, then its peak value Vowill be:

Question # 8

The phase at the positive peak of an A.C. cycle is:

Question # 9

Alternating current can be transmitted:

Question # 10

For the normal operation of the transistor, its

Question # 11

If the value of C in a series RLC circuit is increased, the resonant frequency

Question # 12

Alternating current is produced by a voltage source which polarity:

Question # 13

The sum of positive and negative peak values is called:

Question # 14

For normal operation of transistor, the batteries

Question # 15

The Instantaneous value of alternative current maybe:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance
A. 5.07 pF
B. 50 pF
C. 0.507 pF
D. 507 pF
2 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
3 When the pn-junction is in reversed biased, current flows through the junction due to the
A. majority carriers
B. minority carriers
C. either of them
D. none of them
4 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
5 The value of the input resistance of OP-AMP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several maga ohms
6 If we connected the ordinary DC ammeter to measure alternating current, it would measure its:
A. Instantaneous value
B. RMS value
C. Value averaged over a cycle
D. Either (B) or (C)
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 If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
A. 353.5V
B. 250V
C. 175V
D. zero
9 At resonance, the impedance of RLC series circuit is
A. Maximum
B. Zero
C. Minimum
D. Determinate
10 An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is
A. 3525.0 volts
B. 35.35 volts
C. 353.5 volts
D. 3.535 volts

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