# MCQ on Electrical Network Theorem

1) An active element in a circuit is one which ………

- receives energy
- supplies energy
- both receives and supplies energy
- none of the above

2) A passive element in a circuit is one which ………

- receives energy
- supplies energy
- both receives and supplies energy
- none of the above

3) An electric circuit contains …….

- active elements only
- passive elements only
- both active and passive elements
- none of the above

4) A linear circuit is one whose parameter ………

- changes with change in current
- changes with change in voltage
- changes with both voltage and current
- do not changes with voltage and current

5) The number of nodes in below given figures are

- one
- two
- three
- four

6) The superposition theorem is used when the circuit contains ………….

- a single voltage sources
- a number of voltage sources
- only passive elements
- none of the above

7) Norton theorem is ……………. thevenin’s theorem.

- the same as
- converse of
- cannot say
- none of the above

8) In the analysis of a vacuum tube circuit,we generally use …………… theorem

- superposition
- thevinin
- norton
- reciprocity

9) Norton theorem is ………….. form of an equivalent circuit.

- both current and voltage
- current
- voltage
- none of the above

10) In the analysis of transistor theorem, we usually uses ………… theorem.

- norton
- thevinin
- reciprocity
- superposition

11) For transfer of maximum power, the relation between load resistance R and internal resistance r of the voltage source is

- R = 2r
- R = 1.5r
- R = r
- R = 0.5r

12) Under the condition of maximum power transfer, the efficiency is

- 100%
- 75%
- 50%
- 25%

- 13) The open circuited voltage at the transfer of load R is 30 V. Under the condition of maximum load power transfer, the load voltage will be ……
- 30 V
- 15 V
- 10 V
- 5 V

14) The maximum power transfer theorem is used in ………

- electronic circuits
- power systems
- home lightning system
- none of the above

15) Under the condition of maximum power transfer, a voltage source is delivering a power of 3 W to the load. The power generated by the source is ………….

- 45 W
- 30 W
- 60 W
- 90 W