Theorem Questions
Theorem Questions
Theorem Questions
If two currents are in the same direction at any instant of time in a given branch of a
circuit, the net current at that instant
1.
2.
3.
4.
1.
2.
3.
4.
none of these
1.
none of these
2.
3.
4.
In order to get maximum power transfer from a capacitive source, the load must
1.
none of these
2.
3.
4.
be as capacitive as it is inductive
1.
2.
3.
4.
1. Question
10
20
30
40
2. Question
2.5 Ohms
5 Ohms
7.5 Ohms
10 Ohms
3. Question
Electronics Circuits.
Electrical Circuits.
Junctions in a network.
4. Question
According to KVL the algebraic sum of all the IR drops and Emfs in any closed loop of a
network:
is always positive,
is equal to zero.
5. Question
6. Question
If all the resistances in the circuit are one ohm. Find the equivalent resistance between points A
and B.
1 Ohm
0.5 Ohm
2 Ohms
1.5 Ohms
7. Question
In the following circuit the total current through the voltage source V0 , I is equal to:
One Ampere
Two Ampere
Three Ampere
Four Ampere
8. Question
Two heaters; both rated 1000 Watt , 250 volt; are connected in series to a 250 voltage , 50 Hz
power supply. The total power drawn from the source would be:
1000 Watts
500 Watts
250 Watts
2000 Watts
9. Question
Two light bulbs rates 40 watt and 60 watt are connected in series to the mains power supply.
Then.
10. Question
How many 200W/220 V incandescent lamps connected in series would consume the same
amount of power as 100W/ 220V incandescent lamp?
Not Possible.
11. Question
A certain network consists of large number of ideal linear resistances, one of which is designated
as R and two constant ideal sources. The power consumed by R is P1 when only first source is
active and P2 when only the second source is active. If both sources are active simultaneously
then the power consumed by R is:
P1 P 2
P1 P2
(P1 P2)2
(P1 P2)2
12. Question
The incandescent bulbs rates respectively P1 and P2 for operation at a specific mains voltage are
connected in series across the mains in series. Then the total power supplied by the mains to the
two bulbs is:
(P1P2) (P1 + P2 )
(P12 + P22 )
P1 + P 2
(P1 . P2)
13. Question
A network has 4 nodes and 3 independent loops what is the number of branches in the network?
14. Question
3 loop equations.
4 loop equations.
7 loop equations.
10 loop equations.
15. Question
Open Circuited.
Short Circuited.
Replaced by a capacitor.
Replaced by an Inductor.
16. Question
A network have 10 nodes and 17 branches. The number of different node pair voltage would be:
45
10
17. Question
If the number of branches in a network is B , the number of nodes is N . and the numbers of
dependent loops is L. Then the numbers of independent node equations will be:
N+L-1
B-1
B-N
N-1
18. Question
A constant current source supplies 300 mA to a load of 1 kilo ohms. When the load is changed to
2 kilo ohms the current through the load will be:
150 mA
300 mA
600 mA
30 mA
19. Question
open circuited.
short circuited.
replaced by an inductor.
20. Question
21. Question
IR drop.
battery EMF.
junction voltage,
22. Question
In the following circuit; what is the total power delivered by the 24v power supply?
96 W
114 W
192 W
288 W
23. Question
The current through the 3 Ohms resistor in the circuit below is:
0 mA
1 mA
2 mA
6 mA
24. Question
Assuming ideal elements in the circuit shown below. The voltage across A , B : VAB is?
-3 V
0V
3V
5V
25. Question
In the interconnection of ideal sources shown in the figure below, It is known that the 60 V
source is absorbing power. What is the value of I in the current source I0 ?
10 A
13 A
15 A
18 A
26. Question
The current through 120 Ohms resistor on the circuit shown in the figure is:
1A
2A
3A
4A
27. Question
For the network shown in the figure, what is the voltage across the current source I?
V - RI
V + RI
Zero
RI - V
28. Question
For the circuit shown , find out the current through the 2 ohms resistor. Also identify the changes
to be made to double the current through the 2 ohms resistor.
5 A ; Put V = 20 V
2 A ; Put V = 8 V
5 A ; Put I = 10 A
7 A ; Put I = 12 A
29. Question
In the circuit shown in the figure, The value of the current through 3 ohms resister will be:
0.31 A
1.25 A
1.75 A
2.5 A
30. Question
When a resistor R is connected to a current source , it consumes a power of 18 watts. When the
same R is connected to a voltage source having same magnitude as the current source , the power
absorbed by R is 4.5 Watts. The magnitude of the current source and the value of R are:
31. Question
For the circuit below, the value of RV is adjusted such that the current through RL is zero. What is
the value of RV?
1 Ohms
2 Ohms
3 Ohms
4 Ohms
32. Question
In the circuit below the value of all the resistances is R Ohms . The switch is initially open.
What happens to the Lamps intensity when the switch is closed?
Increase.
Drcrease
33. Question
voltage calculations.
bilateral elements.
power calculations.
passive elements.
34. Question
Which of the following theorem is applicable for both linear and nonlinear circuits?
Superposition theorem.
Thevenin's theorem.
Norton's theorem.
none of these.
35. Question
In the circuit shown in figure, what will be the value of current i through the voltage source when
v=4 Volts.
one amps
two amps
zero amps
three amps
36. Question
one amps
two amps
three amps
four amps
37. Question
In the network shown below, what is the current i , in the direction shown?
0 amps
1/3 amps
5/6 amps
3 amps
38. Question
In the circuit given below, what is the voltage across the current source Is?
0V
2V
3V
6V
39. Question
In the circuit below , when the current source Is is 0 amps , then I = 1 Amps. Now find the value
of I when the value of Is 2 amperes.
7 Amps
5 Amps
3 Amps
2 Amps
40. Question
In the circuit shown below, what is the voltage across 5 Ohms resistor?
-30 V
30 V
-1250 V
1250 V
41. Question
For the circuit given in the figure below, the power delivered by the 2 V source is :
4 watts
2 watts
-2 watts
-4 watts
42. Question
A 10 V battery with an internal resistance of 1 Ohms is connected across a non-linear load whose
v-i characteristics is given by; 7i = v2 + 2v ; the current delivered by the battery is:
2.5 amps
5 amps
6 amps
7 amps
43. Question
5 amps
10 amps
15 amps
20 amps
44. Question
In the given circuit the potential difference between the point P and Q is:
12 v
10 v
-6 v
8v
45. Question
46. Question
KCL
KVL
47. Question
In nodal analysis, if there are N nodes in the circuit, then how many equations will be written to
solve the network?
N-1
N+1
N+2
48. Question
Point out the wrong statement: In the node voltage technique of solving networks, choice of
reference node does not:
49. Question
3. A circuit with fewer nodes then meshes is better analysed using mesh
analysis, while a circuit with fewer meshes, then nodes is better analysed
using nodal analysis.
1 and 2 only.
2 and 3 only.
1 and 3 only.
1, 2 and 3.
50. Question
51. Question
In the circuit shown below, The black box contains only resistors and independent sources.
When R is 0 Ohms , I = 3 Amps and When R=2 Ohms, I = 1.5 Amps. What is the current for
R=1 Ohm?
1 Amps
2 Amps
3 Amps
4 Amps
52. Question
In the given figure, The Thevenins equivalent pair ( Voltage , impedance), as seen at the
terminals P-Q is given by:
2V, 5 Ohms
4V, 5 Ohms
53. Question
For the network shown below, when I=0 , VPQ=20V and when r=0, I=10 A. If now R=3 Ohms,
What is the value of current I?
6.67 Amps
6.0 Amps
4.0 Amps
10.0 Amps
54. Question
For the terminals a , b in the circuit given below; The Thevenins voltage and resistance are
respectively:
5 V, 10 ohms
10 V, 10 ohms
5 V, 5 ohms
54 V, 15 ohms
55. Question
The Thevenins equivalent resistance Rth for the given network along the terminal AB is:
One Ohms
Two Ohms
Four Ohms
Infinite Ohms
56. Question
For the circuit shown in the figure, the Thevenin voltage and resistance at the terminal AB are:
4/3 V , 2 ohms
4 V , 2/3 ohms
4 V , 2 ohms
57. Question
Norton equivalent to the network given below, of AB is a current source IN = 4 Amps from B to
A, RN = 2 Ohms. The current through RL when it is connected across AB is 2 Amps, What is the
value of resistance RL ?
One Ohms
Two Ohms
Three Ohms
Four Ohms
58. Question
For the network shown in the figure if Vs = 1 Volts and V=0 Volts then , I = -5 Amps. And if Vs=
0 Volts and V = 1 Volts, then I = 1/2 Amps. The value of Ino and Rno or Current and Resistance
equivalent of Norton equivalent of the circuit across AB would be:
-5 A and 2 ohms
5 A and 2 Ohms
59. Question
The Norton equivalent of circuit shown in the first figure below is drawn in the second figure.
The Value of INO and RNO respectively are:
60. Question
The two circuits shown in the figure below are equivalent. In that case, What is the value of I and
r?
3 A, 40 Ohms
4 A, 24 Ohms
1 A, 100 Ohms
2 A, 100 Ohms
61. Question
A voltage source with an internal resistance RS, supplies power to a load RL. The power delivered
to the load varies with RL as:
62. Question
When the power transferred to the load is maximum the efficiency of power transfer is:
25%
75%
50%
100%
63. Question
The maximum power that can be transferred to the load rL from the voltage source in the given
circuit is:
1 watt
10 watts
0.25 watt
0.5 watt
64. Question
Consider the following circuit; What should be the value or R in the circuit, so that it absorbs
maximum power from the source?
8/3 Ohms
3/8 Ohms
4 Ohms
8 Ohms