Mcq Questions_Circuit Theory

1. KVL applies to circuit with_______.

A) Linear elements only
B) Non-linear elements only
C) Linear,non-linear,active and passive elements
D) Linear,non-linear,active,passive,time varient,time invarient elements

Answer is D)
Linear,non-linear,active,passive,time varient,time invarient elements

2. Kirchhoff's law are not applicable to circuits with-

A) Distributed parameters
B) Lumped parameters
C) Passive elements
D) Nonlinear resistances

Answer is A)
Distributed parameters

3. The open circuit voltage across the load terminals is 30 V .The terminal voltage drops to 20 V , when the load of 15 ohms is connected across the open circuited terminals.What is the internal resistance(in ohms) of the source?

A) 5.5
B) 8
C) 10
D) 7.5

Answer is D)
7.5

4. Which of the following law is based on the conservation of energy ?

A) KCL
B) KVL
C) Ohm's Law
D) Coulomb's Law

Answer is B)
KVL

5. Which one of the following law is based on the principle of conservation of electric charge ?

A) KCL
B) KVL
C) Ohm's Law
D) Faraday's Law

Answer is A)
KCL

6. Two incandescent light bulbs of 40 W and 60 W rating are connected in series across the mains.Then-

A) The bulbs together consume 100 W.
B) The bulbs together consume 50 W.
C) The 60 W bulb glows brighter.
D) The 40 W bulb glows brighter.

Answer is D)
The 40 W bulb glows brighter.

7. Energy stored in capacitor over a cycle,when excited by an ac source is

A) the same as that due to a dc source of equivalent magnitude.
B) half of that due to a dc source of equivalent magnitude.
C) Zero.
D) none of the above.

Answer is C)
Zero.

8. The current in a coil changes from 5 A to 1 A in 0.4 second.The induced voltage is 40 V.The self-inductance in henry is

A) 1
B) 2
C) 4
D) 10

Answer is C)
4

9. In the figure given below , if resistor R3 becomes open circuited,the voltmeter will read________.

   

A) 0 V
B) 62.5 V
C) 125 V
D) 250 V

Answer is D)
250 V

10. Calculate the potential difference (in V) between point A and B?

     

A) 110
B) 112
C) 120
D) 114

Answer is D)
114

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