# Network Theorems Mcqs - Set 4

1)   Kirchhoffs current law is applicable to only

a. junction in a network
b. closed loops in a network
c. electric circuits
d. electronic circuits
 Answer  Explanation ANSWER: junction in a network Explanation: No explanation is available for this question!

2)   Thevenin resistance Rth is found

a. by removing voltage sources along with their internal resistances
b. by short-circuiting the given two terminals
c. between any two ‘open’ terminals
d. between same open terminals as for Etk
 Answer  Explanation ANSWER: between same open terminals as for Etk Explanation: No explanation is available for this question!

3)   The resistance LM will be____________?

a. 6.66 Q
b. 12 Q
c. 18Q
d. 20Q
 Answer  Explanation ANSWER: 6.66 Q Explanation: No explanation is available for this question!

4)   Efficiency of power transfer when maximum transfer of power c xerosis

a. 100%
b. 80%
c. 75%
d. 50%
 Answer  Explanation ANSWER: 50% Explanation: No explanation is available for this question!

5)   For maximum transfer of power, internal resistance of the source should be_____________?

a. equal to load resistance
b. less than the load resistance
c. greater than the load resistance
d. none of the above
 Answer  Explanation ANSWER: equal to load resistance Explanation: No explanation is available for this question!

6)   The circuit has resistors, capacitors and semi-conductor diodes. The circuit will be known as___________?

a. non-linear circuit
b. linear circuit
c. bilateral circuit
d. none of the above
 Answer  Explanation ANSWER: non-linear circuit Explanation: No explanation is available for this question!

7)   A network which contains one or more than one source of e.m.f. is known as___________?

a. linear network
b. non-linear network
c. passive network
d. active network
 Answer  Explanation ANSWER: active network Explanation: No explanation is available for this question!

8)   Millman’s theorem yields____________?

a. equivalent resistance
b. equivalent impedance
c. equivalent voltage source
d. equivalent voltage or current source
 Answer  Explanation ANSWER: equivalent voltage or current source Explanation: No explanation is available for this question!

9)   The number of independent equations to solve a network is equal to_____________?

a. the number of chords
b. the number of branches
c. sum of the number of branches and chords
d. sum of number of branches, chords and nodes
 Answer  Explanation ANSWER: the number of chords Explanation: No explanation is available for this question!

10)   A star circuit has element of resistance R/2. The equivalent delta elements will be_____________?

a. R/6
b. fi?
c. 2R
d. 4R
 Answer  Explanation ANSWER: fi? Explanation: No explanation is available for this question!

11)   Which of the following is the passive element?

a. Capacitance
b. Ideal current source
c. Ideal voltage source
d. All of the above
 Answer  Explanation ANSWER: Capacitance Explanation: No explanation is available for this question!

12)   A passive network is one which contains____________?

a. only variable resistances
b. only some sources of e.m.f. in it
c. only two sources of e.m.f. in it
d. no source of e.m.f. in it
 Answer  Explanation ANSWER: no source of e.m.f. in it Explanation: No explanation is available for this question!

13)   “In any network containing more than one sources of e.m.f. the current in any branch is the algebraic sum of a number of individual fictitious currents (the number being equal to the number of sources of e.m.f.), each of which is due to separate action of each source of e.m.f., taken in order, when the remaining sources of e.m.f. are replaced by conductors, the resistances of which are equal to the internal resistances of the respective sources”. The above statement is associated with:

a. Thevenin’s theorem
b. Norton’s theorem
c. Superposition theorem
d. None of the above
 Answer  Explanation ANSWER: Superposition theorem Explanation: No explanation is available for this question!

14)   “Any number of current sources in parallel may be replaced by a single current source whose current is the algebraic sum of individual source currents and source resistance is the parallel combination of individual source resistances”. This statement is associated with:

a. Thevenin’s theorem
b. Millman’s theorem
c. Maximum power transfer theorem
d. None of the above
 Answer  Explanation ANSWER: Millman’s theorem Explanation: No explanation is available for this question!

15)   To determine the polarity of the voltage drop across a resistor, it is necessary to know___________?

a. value of current through the resistor
b. direction of current through the resistor
c. value of resistor
d. e.m.fs. in the circuit
 Answer  Explanation ANSWER: direction of current through the resistor Explanation: No explanation is available for this question!

16)   Kirchhoffs voltage law is related to_____________?

a. junction currents
b. battery e.m.fs.
c. IR drops
d. both B. and C.
e. none of the above
 Answer  Explanation ANSWER: both B. and C. Explanation: No explanation is available for this question!

17)   Superposition theorem can be applied only to circuits having____________?

a. resistive elements
b. passive elements
c. non-linear elements
d. linear bilateral elements
 Answer  Explanation ANSWER: linear bilateral elements Explanation: No explanation is available for this question!