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Network Theory Set-2
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1. If the resistances 1Ω, 2Ω, 3Ω, 4Ω are parallel, then the equivalent resistance is?
0.46Ω
0.48Ω
0.5Ω
0.52Ω
2. If the resistances 3Ω, 5Ω, 7Ω, 9Ω are in series, then their equivalent resistance(Ω) is?
9
20
24
32
3. Pick the incorrect statement among the following.
Inductor is a passive element
Current source is an active element
Resistor is a passive element
Voltage source is a passive element
4. For a voltage source to be neglected, the terminals across the source should be ___________
replaced by inductor
short circuited
replaced by some resistance
open circuited
5. Voltage source and terminal voltage can be related as ___________
terminal voltage is higher than the source emf
terminal voltage is equal to the source emf
terminal voltage is always lower than source emf
terminal voltage cannot exceed source emf
6. In case of ideal current sources, they have ___________
zero internal resistance
low value of voltage
large value of currrent
infinite internal resistance
7. In a network consisting of linear resistors and ideal voltage source, if the value of resistors are doubled, then voltage across each resistor ___________
increases four times
remains unchanged
doubled
halved
8. A practical current source can also be represented as ___________
a resistance in parallel with an ideal voltage source
a resistance in parallel with an ideal current source
a resistance in series with an ideal current source
none of the mentioned
9. A practical voltage source can also be represented as ___________
a resistance in series with an ideal current source
a resistance in series with an ideal voltage source
a resistance in parallel with an ideal voltage source
none of the mentioned
10. Constant voltage source is ___________
active and bilateral
passive and bilateral
active and unilateral
passive and unilateral
11. Which of the following is true about an ideal voltage source?
zero resistance
small emf
large emf
infinite resistance
12. A dependent source ___________
may be a current source or a voltage source
is always a voltage source
is always a current source
none of the mentioned
13. With some initial change at t = 0+, a capacitor will act as ___________
open circuit
short circuit
a current source
a voltage source
14. If a current source is to be neglected, the terminals across the source are ___________
replaced by a source resistance
open circuited
replaced by a capacitor
short circuited
15. 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 ___________
9mA
4A
700mA
12A
16. A voltage source having an open circuit voltage of 200 V and internal resistance of 50Ω is equivalent to a current source of ___________
4A with 50Ω in parallel
4A with 50Ω in series
0.5A with 50Ω in parallel
none of the mentioned
17. 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?
1150 W
1250 W
5625 W
5000 W
18. The current in a closed path in a loop is called?
loop current
branch current
link current
twig current
19. Tie-set is also called?
f loop
g loop
d loop
e loop
20. The loop current direction of the basic loop formed from the tree of the graph is?
same as the direction of the branch current
opposite to the direction of the link current
same as the direction of the link current
opposite to the direction of the branch current
21. The matrix formed by link branches of a tie set matrix is?
Row matrix
Column matrix
Diagonal matrix
Identity matrix
22. What is the direction of the cut-set?
same as the direction of the branch current
opposite to the direction of the link current
same as the direction of the link current
opposite to the direction of the branch current
23. For every tree there will be _____ number of cut set matrices.
1
2
3
4
24. Mesh analysis is applicable for non planar networks also.
true
false
25. A mesh is a loop which contains ____ number of loops within it.
1
2
3
no loop
26. If there are 5 branches and 4 nodes in graph, then the number of mesh equations that can be formed are?
2
4
6
8
27. If there are 8 nodes in network, we can get ____ number of equations in the nodal analysis.
9
8
7
6
28. Nodal analysis can be applied for non planar networks also.
true
false
29. In nodal analysis how many nodes are taken as reference nodes?
1
2
3
4
30. In Superposition theorem, while considering a source, all other voltage sources are?
open circuited
short circuited
change its position
removed from the circuit
31. In Superposition theorem, while considering a source, all other current sources are?
short circuited
change its position
open circuited
removed from the circuit
32. To check for the Reciprocity Theorem we consider ______ of response to excitation.
ratio
addition
product
subtraction
33. For the Reciprocity Theorem to satisfy the ratio of response to excitation before and after the source is replaced should be?
different
same
before source is replaced is greater than after the source is replaced
before source is replaced is less than after the source is replaced
34. The circuit which satisfies Reciprocity Theorem is called?
Short circuit
Open circuit
Linear circuit
Non-linear circuit
35. While considering Reciprocity theorem, we consider ratio of response to excitation as ratio of?
voltage to voltage
current to current
voltage to current
none of the mentioned
36. Reciprocity Theorem is applied for _____ networks.
Linear
Bilateral
Linear bilateral
Lumped
37. Reciprocity Theorem is used to find the change in _______ when the resistance is changed in the circuit.
Voltage
Voltage or current
Current
Power
38. The maximum power is delivered from a source to its load when the load resistance is ______ the source resistance.
Greater than
less than
equal to
less than or equal to
39. If source impedance is complex, then maximum power transfer occurs when the load impedance is _______ the source impedance.
equal to
negative of
complex conjugate of
negative of complex conjugate of
40. The dual pair of current is?
voltage
current source
capacitance
conductance
41. The dual pair of capacitance is?
capacitance
resistance
current source
inductance
42. The dual pair of resistance is?
inductance
capacitance
conductance
current
43. The dual pair of voltage source is?
voltage
current source
current
resistance
44. The dual pair of KCL is?
KVL
Current
voltage
current source
45. Tellegen’s Theorem is valid for _____ network.
linear or non-linear
passive or active
time variant or time invariant
all of the mentioned
46. For Tellegan’s Theorem to satisfy, the algebraic sum of the power delivered by the source is _____ than power absorbed by all elements.
greater
less
equal
greater than or equal
47. According to Millman’s Theorem, if there are n voltage sources with n internal resistances respectively, are in parallel, then these sources are replaced by?
single current source I’ in series with R’
single voltage source V’ in series with R’
single current source I’ in parallel to R’
single voltage source V’ in parallel to R’
48. According to Millman’s Theorem, if there are n current sources with n internal conductances respectively, are in series, then these sources are replaced by?
single voltage source V’ in parallel with G’
single current source I’ in series with G’
single current source I’ in parallel with G’
single voltage source V’ in series with G’
49. While computing the Thevenin equivalent resistance and the Thevenin equivalent voltage, which of the following steps are undertaken?
Both the dependent and independent voltage sources are short-circuited and both the dependent and independent current sources are open-circuited
Both the dependent and independent voltage sources are open-circuited and both the dependent and independent current sources are short-circuited
The dependent voltage source is short-circuited keeping the independent voltage source untouched and the dependent current source is open-circuited keeping the independent current source untouched
The dependent voltage source is open-circuited keeping the independent voltage source untouched and the dependent current source is short-circuited keeping the independent current source untouched
50. While computing the Norton equivalent resistance and the Norton equivalent current, which of the following steps are undertaken?
Both the dependent and independent voltage sources are short-circuited and both the dependent and independent current sources are open-circuited
Both the dependent and independent voltage sources are open-circuited and both the dependent and independent current sources are short-circuited
The dependent voltage source is open-circuited keeping the independent voltage source untouched and the dependent current source is short-circuited keeping the independent current source untouched
The dependent voltage source is short-circuited keeping the independent voltage source untouched and the dependent current source is open-circuited keeping the independent current source untouched
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