🧪 PI (AC/DC) simulation MCQ Quiz Hub

1. Ideal voltage source should have:
zero internal resistance
infinite internal resistance
large value of EMF
low value of current

2. Ideal voltage sources have:
zero internal resistance
infinite internal resistance
large value of EMF
low value of current

3. Ideal current sources have:
zero internal resistance
infinite internal resistance
low value of voltage
large value of current

4. A dependent source:
may be a current source or a voltage source
is always a voltage source
is always a current source
neither a current source nor a voltage source

5. Three resistances each of R Ω are connected to form a triangle. The resistance between any two terminals will be:
RΩ
3/2 RΩ
3 RΩ
2/3 RΩ

6. For the circuit shown for Q.6, the current flowing through the circuit will be
1:5 A
1.0 A
0.5 A
0.75 A

7. How are 500 Ω resistors connected so as to give an effective resistance of 750 Ω?
Three resistors of 500 Ω each, in parallel
Three resistors of 500 Ω each, in series
Two resistors of 500 Ω each, in parallel
Two resistors of 500 Ω each, in parallel and the combination in series with another 500 Ω resistor

8. Which of the following is an active element in a circuit?
Current source
Resistance
Inductance
Capacitance

9. A terminal where more than two branches meet is known as
node
terminus
anode
none of these

10. Kirchhoff’s voltage law is concerned with:
IR drop
battery emfs
junction voltage
both IR drop and battery emfs

11. According to Kirchhoff s voltage law, the algebraic sum of all IR drops and EMFs in any closed loop of a network is always
negative
positive
zero
determined by emfs of the batteries

12. The algebraic sign of an IR drop primarily depends upon the
direction of flow of current
battery connections
magnitude of current flowing through it
value of resistance

13. The superposition theorem requires as many circuits to be solved as there are
nodes
sources
nodes and sources
meshes

14. Maxwell’s loop current method of solving electrical networks:
uses branch currents
utilizes Kirchhoff’s voltage law
is confined to single-loop circuits
is a network reduction method

15. Mesh analysis is based on:
KVL
KCL
both
law of conservation of energy

16. Nodal analysis is based on:
KCL
KVL
both
law of conservation of energy

17. 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
N – 2

18. An electrical network with six independent nodes has:
10 loop equations
3 loop equations
5 loop equations
7 loop equations

19. Point out the wrong statement. In the node voltage technique of solving networks, the choice of a reference node does not:
affect the operation of the circuit
change the voltage across any element
alter the pd between any pair of nodes
affect the voltages of various nodes

20. While Thevenizing a circuit between two terminals, VTH is equal to
short-circuit terminal voltage
open-circuit terminal voltage
net voltage available in the circuit
emf of the battery nearest to the terminals

21. Thevenin’s resistance RTH is determined
by short-circuiting the given two terminals
by removing the voltage sources along with their internal resistances
between same open terminals as for VTH
between any two open terminals

22. While determining RTH of a circuit
voltage and current sources should be left as they are
all sources should be replaced by their source resistances
all independent current and voltage sources are short-circuited
none of the above

23. Which of the following statements is/are correct
Norton’s equivalent resistance is the same as Thevenin’s equivalent resistance RTH
Norton’s equivalent is the current equivalent of the network
The load is connected in parallel to the Norton’s equivalent resistance and Norton’s equivalent current source
all of the above

24. While determining RTH in Thevenin’s and Norton’s equivalent
only current sources are made dead
only voltage sources are made dead
all independent sources are made dead
all current and voltage sources are made dead

25. When the power transferred to the load is maximum, the efficiency of power transfer is:
25%
50%
75%
100%

26. For maximum transfer of power, the internal resistance of the source should be
equal to load resistance
less than that of load
more than that of load
none of the above

27. If in the delta, RC = 2 Rb, Rb = Ra, then the star resistance in the above question will be
Rb/2
2Rb
Rc
Rc/2

28. A Y arrangement of resistances has each resistance of 3 Ω. The equivalent delta arrangement will have each resistance of values
9 Ω
6 Ω
3 Ω
1 Ω

29. Three equal resistances are connected in the star. If this star is converted into an equivalent delta
The resistance of both the networks will be equal
the resistances of the delta network will be smaller than those of star network
the resistances of the delta network will be larger than those of star network
none of the above

30. In a series R-L-C circuit, R = 100 ohms, XL = 300 ohms and Xc = 200 ohms. The phase angle ϕ of the circuit is:
0 degrees
90 degrees
45 degrees
-45 degrees