ONLINE QUIZ | BASIC ELECTRICAL ENGINEERING MCQs | ELECTRICAL ENGINEERING MCQ

ELECTRICAL ENGINEERIN QUIZ|
BASIC ELECTRICAL ENGINEERING QUIZ|
ONLINE QUIZ | What is the electrical degree of 6 pole stator motor?

#SSC JE PREVIOUS YEAR PAPER
#RRB JE
#RSEB

1. A terminal where more than two branches met is called ?

a) Node
b) Terminus
c) Loop
d) None of the above

... Answer is (a)
node

2. An ideal current source has

a) Infinite source resistance
b) Zero internal resistance
c) Zero voltage on no load
d) Zero ripple

... Answer is (a)
Infinite source resistance

3. An ideal voltage source should have ?

a) Zero source resistance
b) Infinite source resistance
c) Terminal voltage is proportional to current
d) Open-circuit voltage nearly equal to voltage ofthe load current

... Answer is (a)
Zero source resistance

4. Mesh analysis is based on ?

a) Kirchhoff’s Current Law
b) Kirchhoff’s Voltage Law
c) Both
d) None

... Answer is (b)
Kirchhoff’s Voltage Law

5. Define Kirchoff’s voltage law ?

(a) algebraic sum of emf’s - algebraic sum of voltage drops = 0
(b) algebraic sum of emf’s + algebraic sum of voltage drops = 0
(c) zero
(d) algebraic sum of currents

... Answer is (a)
(a) algebraic sum of emf’s - algebraic sum of voltage drops = 0

6. Ohm’s Law states that current through a conductor, under..........conditions is proportional to potential difference across the conductor. ?

(a) constant pressure
(b) constant pressure, temperature and volume
(c) constant volume
(d) constant temperature

... Answer is (b)
constant pressure, temperature and volume

7. The following voltage drops are measured across each of three resistors in series: 5.2V, 8.5V, 12.3V. What is the value of the source voltage to which these resistors are connected?

(a) 26V
(b) 5.2V
(c) 8.2V
(d) 12.3V

... Answer is (a)
(a) 26V

8. 19. The unit of energy is ?

a. Watts
b. Volts
c. Current
d. None

... Answer is (c)
None

9. In a parallel circuit, the total resistance of circuit--------------as the number of resistors connected in parallel-----------------------?

(a) increases, increases
(b) increases, decreases
(c) decreases, decreases
(d) decreases, increases

... Answer is (d)
(d) decreases, increases

10. In a parallel circuit, the total resistance of circuit--------------as the number of resistors connected in series -----------------------?

(a) increases, increases
(b) increases, decreases
(c) decreases, decreases
(d) decreases, increases

... Answer is (a)
increases, increases

11. In a four branch series circuit, 100mA of current flows in each branch. If one of the branch opens, what is the current in each of the other branches ?

(a) increases
(b) unaffected
(c) doubles
(d) zero

... Answer is (d)
zero

12. A battery of emf 1.8 volts is connected to a pair of resistances 4 ohm and 6 ohm in parallel. Calculate the current supplied by the battery ?

(a) 7.5 A
(b) 10 A
(c) 1.75 A
(d) 0.75 A

... Answer is (d)
0.75 A

13. When n resistances of value x are connected in series, total resistance is ?

(A) nx
(B) rnx
(C) x / n
(D) n2 x.

... Answer is (a)
nx

14. Which of the following is not the same as watt ?

(A) joule/sec
(B) amperes/volt
C) amperes x volts
(D) ( amperes )2 x ohm.

... Answer is (b)
amperes/volt

15. A circuit contains two un-equal resistances in parallel ?

(A) current is same in both
(B) large current flows in larger resistor
(C) potential difference across each is same
(D) smaller resistance has smaller conductance.

... Answer is (c)
potential difference across each is same

16. Four identical resistors are first connected in parallel and then in series. The resultant resistance of the first combination to the second will be times?

(A) 1 / 16 times

(B) 1 / 4 times
(C) 4 times
(D) 16 times.

... Answer is (a)
1 / 16 times

17. The ratio of the resistance of a 100 W, 220 V lamp to that of a 100 W, 110 V lamp will be nearly ?

(A) 4
(B)2
(C) 1 / 2
(D) 1 / 4

... Answer is (a)
4

18. Three elements having conductance G1, G2 and G3 are connected in parallel. Their combined conductance will be ?

(A) 1/( 1/G1 + 1/G2 + 1/G3)
(B) (G1G2 + G2G3 + G3G1)/(G1 + G2 + G3)
(C) 1/(G1 + G2+ G3)
(D) G1 + G2 +G3

... Answer is (d)
(D) G1 + G2 +G3

19. Ohm's law is not applicable in all the following cases Except ?

(A) Electrolytes
(B) Arc lampsर
(C) Insulators
(D) Vacuum ratio values

... Answer is (c)
Insulators

20. A wire of resistance R has it length and cross-section both doubled. Its resistance will become ?

(A) 4 R
(B)2 R
(c) R
(D) R / 4.

... Answer is (c)
R

21. In a four branch parallel circuit, 10mA of current flows in each branch. If one of the branch opens, whatis the current in each of the other branches ?

(a) unaffected
(b) increases
(c) decreases
(d) doubles

... Answer is (b)
increases

22. Identify the passive element among the following ?

a. Voltage source
b. current source
c. inductor
d. transistor

... Answer is (c)
inductor

23. The nodal method of circuit analysis is based on ………… ?

a. KVL + ohms law
b. KCL + ohms law
c. KVL + KCL
d. KVL + ohms law +KCL

... Answer is (a)
KVL + ohms law

24. In a four branch series circuit, 10mA of current flows in each branch. If one of the branch opens, what is the current in each of the other branches ?

(a) unaffected
(b) increases
(c) decreases
(d) zero

... Answer is (d)
(d) zero

25. State Kirchoff’s current Law ?

(a) sum of all positive currents is equal to sum of all negative currents.
(b) sum of all positive emfs is equal to the sum of all negative emfs taken in order
(c) sum of all powers in a circuit
(d) sum of all emfs in a circuit

... Answer is (a)
sum of all positive currents is equal to sum of all negative currents.

26. The curve representing ohm's law is ?

a. sine function
b. Linear
c. a parabola
d. a hyperbola

... Answer is (b)
Linear

27. The resistance of a conductor having length l area of cross section a and resistivity ρ is given as: ?

a. ρa/l
b. ρl/a
c. ρla
d. l/ρ

... Answer is (b)
ρl/a

28. Which of the following statements is false in case of a series circuit?

a. the voltage drop across each resister is same
b. the current flowing through each resistor is the same
c. applied voltage is equal to the sum of voltage drops across individual resistors are additive
d.none

... Answer is (b)
the current flowing through each resistor is the same

29. Which of the following quantities are same in all parts of a series circuit?

a. voltage
b. power
c. current
d. resistance

... Answer is (c)
current

30. A 100W bulb is connected in series with a room heater. If now 100W bulb is replaced by a 40w bulb, the heater output will

a. increase
b. decrease
c. remain the same
d. none

... Answer is (b)
decrease