# Voltage and Current Sources MCQ’s

This set of Network Theory Multiple Choice Questions & Answers (MCQs) focuses on “Voltage and Current Sources”.

1. For a voltage source to be neglected, the terminals across the source should be ___________
a) replaced by inductor
b) short circuited
c) replaced by some resistance
d) open circuited

2. Voltage source and terminal voltage can be related as ___________
a) terminal voltage is higher than the source emf
b) terminal voltage is equal to the source emf
c) terminal voltage is always lower than source emf
d) terminal voltage cannot exceed source emf

3. Pick the incorrect statement among the following.
a) Inductor is a passive element
b) Current source is an active element
c) Resistor is a passive element
d) Voltage source is a passive element

4. In case of ideal current sources, they have ___________
a) zero internal resistance
b) low value of voltage
c) large value of currrent
d) infinite internal resistance

5. A practical current source can also be represented as ___________
a) a resistance in parallel with an ideal voltage source
b) a resistance in parallel with an ideal current source
c) a resistance in series with an ideal current source
d) none of the mentioned

6. Constant voltage source is ___________
a) active and bilateral
b) passive and bilateral
c) active and unilateral
d) passive and unilateral

7. In a network consisting of linear resistors and ideal voltage source, if the value of resistors are doubled, then voltage across each resistor ___________
a) increases four times
b) remains unchanged
c) doubled
d) halved

8. A practical voltage source can also be represented as ___________
a) a resistance in series with an ideal current source
b) a resistance in series with an ideal voltage source
c) a resistance in parallel with an ideal voltage source
d) none of the mentioned

9. Which of the following is true about an ideal voltage source?
a) zero resistance
b) small emf
c) large emf
d) infinite resistance

10. With some initial change at t = 0+, a capacitor will act as ___________
a) open circuit
b) short circuit
c) a current source
d) a voltage source

11. A constant current source supplies a electric current of 200 mA to a load of 2kΩ. When the load changed to 100Ω, the load current will be ___________
a) 9mA
b) 4A
c) 700mA
d) 12A

12. A dependent source ___________
a) may be a current source or a voltage source
b) is always a voltage source
c) is always a current source
d) none of the mentioned

13. If a current source is to be neglected, the terminals across the source are ___________
a) replaced by a source resistance
b) open circuited
c) replaced by a capacitor
d) short circuited

14. A voltage source having an open circuit voltage of 200 V and internal resistance of 50Ω is equivalent to a current source of ___________
a) 4A with 50Ω in parallel
b) 4A with 50Ω in series
c) 0.5A with 50Ω in parallel
d) none of the mentioned

15. A voltage source of 300 V has internal resistance of 4Ω and supplies a load having the same resistance. The power absorbed by the load is?
a) 1150 W
b) 1250 W
c) 5625 W
d) 5000 W