Objective Questions For Electrical Engineering Students
Objective Questions For Electrical Engineering Students
1.The flow of electric current in a conductor is due to flow ofa. electrons
b. protons
c. electrons and ions
d. charged particles.
ans: a.
2. An electric current is the
a. random movement of electrons in a conductor
b. movement of free electrons predominantly in one direction
c. pressure difference between the poles
d. the power that causes drift of electrons
ans: b.
 |
| Electrical Engineering Objective questions |
a. electrons only
b. positive and negative ions
c. electrons and positive ions
d. electrons, positive ions and negative ions
ans: d.
4. The minimum requirement for causing flow of current are
a. a voltage source, a resistor and a switch
b. a voltage source and conductor
c. a power source and bulb
d. a voltage source, a conductor, an ammeter and a switch
ans: b.
5.The draft velocity of electrons is
a. larger than speed of light
b. almost equal to speed of light
c. equal to speed or light
d. very small in comparison to speed of light
ans: d.
6.The resistance of the filament of a bulb is higher than the cold resistance because the temperature coefficient of the filament is
a. Negative
b. Infinite
c. Zero
d. Positive
ans:d.
7. The temperature coefficient of resistance of an insulator is
a. positive and independent of temperature
b. negative and independent of temperature
c. negative and dependent of temperature
d. positive and dependent of temperature.
ans:c.
8. A network has 4 nodes and 3 independent loops. what is the number of branches in the network?
a. 5
b. 6
c. 7
d. 8.
ans:b.
9. If there are b branches and n nodes the number of equations will be
a. n-1
b. b
c. b-n
d. b-n+1
ans:d.
10. An electric circuit with 10 branches and 7 nodes will have
a. 3 loop equations
b. 4 loop equations
c. 7 loop equations
d. 10 loop equations
ans:b.
11. A network has 10 nodes and 17 branches. The number of different node pair voltage would be
a. 7
b. 9
c. 45
d. 10
ans:b.
12. If the number of branches in a network is B the number of nodes is N and the number of dependent loops is L then the number of independent node equations will be
a. N-L-1
b. B-1
c. B-N
d. N-1
ans:d.
13. The graph of an electrical network has N nodes and B branches. The number of links L , with respect to the choice of tree, is given by
a. B-N+1
b. B+N
c. N-B+1
d. N-2B-1.
ans:a.
14. The number of possible ordered trees with 3 nodes A,B,C is
a. 6
b. 8
c. 10
d. 12
ans:d.
15. What is the number of chords of a connected graph G of n vertices and e edges?
a. n(n-1)
b. n-1
c. e-n-1
d. e-n+1.
ans:d.
16. Ideal voltage source have
a. zero internal resistance
b. infinite internal resistance
c. low value of current
d. large value of emf
ans:a.
17. Ideal current source have
a. zero internal resistance
b. infinite internal resistance
c. low value of voltage
d. large value of current.
ans:b.
18. A parctical current source is represented by
a. a resistance in series with an ideal current source
b. a resistance in parallel with an ideal current source
c. a resistance in parallel with an ideal voltage source
d. none of the above
ans:b.
19. 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. neither a current source nor a voltage source
ans:a.
20.To neglect a voltage source, the terminals across the source are
a. open-circuited
b. short-circuited
c. replaced by some resistance
d. replaced by inductor
ans:b.
21. Kirchoff's laws are valid for
a. linear circuits only
b. passive time invariant circuits
c. non linear circuits only
d. both linear and non- linear circuits
ans:d.
22. Kirchoff's voltage law is concerned with
a. IR drop
b. battery emf
c. junction voltage
d. both a and b.
ans:d.
23. Superposition theorem is not applicable for
a. voltage calculations
b. bilateral elements
c. power calculations
d. passive elements
ans:c.
24. which of the following theorems applicable for both linear and non-linear circuits?
a. superposition
b. Thevenin's
c. Norton's
d. none of these.
ans.d.
25. Superposition theorem is not applicable for
a. voltage calculations
b. bilateral elements
c. power calculations
d. passive elements
ans:c.
26. Maxwell's loop current method of solving electrical networks
a. uses branch currents
b. utilises kirchoff's voltage law
c. is confirmed to single-loop circuits
d. is a network reduction method.
ans:b.
27. Nodal analysis is based on
a. KCL
b. KVL
c. both
d. law of conservation of energy .
ans:a.
28. In nodal analysis , if there are N nodes in the circuit, then how many equations will b written to solve the network?
a. N-1
b. N+1
c. N
d. N-2.
ans:a.
29. Point out the wrong statement. In the node voltage technique of solving networks , choice of a reference nodes does not
a. affect the operation of a circuit
b. change the voltage across any element
c. alter the pd between any pair of nodes
d. affect the voltages of various nodes.
ans:d.
30. In a balanced Wheatstone bridge, if the positions of detector and source are interchanged , the bridge will still remain balanced. This inference can be drawn from
a. reciprocity theorem
b. duality theorem
c. compensation theorem
d. equivalence theorem
ans. a.
Post a Comment