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Electrical Engineering Multiple Choice Question Answers listed below. these Question Answers useful for preparing upcoming Engineers Recruitment Examinations conducted by various departments
Question No. #11. A 470 Ω resistor, a 220 Ω resistor, and a 100 Ω resistor
are all in parallel. The total resistance is approximately
A. 790 Ω
B. 470 Ω
C. 60 Ω
D. 30 Ω
ANS : C
Question No. #12. Five light bulbs are connected in parallel across 110 V.
Each bulb is rated at 200 W. The current through each bulb
is approximately
A. 2.2 A
B. 137 mA
C. 1.8 A
D. 9.09 A
ANS : C
Question No. #13. The total resistance of a parallel circuit is 50 Ω. If the
total current is 120 mA, the current through the 270 Ω that
makes up part of the parallel circuit is approximately
A. 22 mA
B. 120 mA
C. 220 mA
D. 50 mA
ANS : A
Question No. #14. Five 100 Ω resistors are connected in parallel. If one
resistor is removed, the total resistance is
A. 25 Ω
B. 500 Ω
C. 100 Ω
D. 20 Ω
ANS : A
Question No. #15. Four 8 Ω speakers are connected in parallel to the
output of an audio amplifier. If the maximum voltage to the
speakers is 12 V, the amplifier must be able to deliver to the
speakers
A. 18 W
B. 1.5 W
C. 48 W
D. 72 W
ANS : D
Question No. #16. In a certain three-branch parallel circuit, R1 has 12 mA through it, R2 has 15 mA through it, and R3 has 25 mA through it. After measuring a total of 27 mA, you can say that
A. R3 is open
B. R1 is open
C. R2 is open
D. the circuit is operating properly
ANS : A
Question No. #17. A sudden increase in the total current into a parallel
circuit may indicate
A. a drop in source voltage
B. an open resistor
C. an increase in source voltage
D. either a drop in source voltage or an open resistor
ANS : C
Question No. #18. Four resistors of equal value are connected in parallel.
If the total voltage is 15 V and the total resistance is 600 Ω,
the current through each parallel resistor is
A. 25 mA
B. 100 mA
C. 6.25 mA
D. 200 mA
ANS : C
Question No. #19. The following resistors are in parallel across a voltage
source: 220Ω , 470Ω , and 560Ω . The resistor with the least
current is
A. 220 Ω
B. 470 Ω
C. 560 Ω
D. impossible to determine without knowing the voltage
ANS : C
Question No. #20. Three 47 Ω resistors are connected in parallel across a
110 volt source. The current drawn from the source is
approximately
A. 2.3 A
B. 780 mA
C. 47 mA
D. 7.06 A
ANS : D
Question No. #21. There is a total of 800 mA of current into four parallel
resistors. The currents through three of the resistors are 40
mA, 70 mA, and 200 mA. The current through the fourth
resistor is
A. 490 mA
B. 800 mA
C. 310 mA
D. 0 A
ANS : A
Question No. #22. Four resistors are connected in parallel. Fifteen mA
flows through resistor R. If the second resistor is 2R, the
third resistor 3R, and the fourth resistor 4R, the total
current in the circuit is
A. 60 mA
B. 15 mA
C. 135 mA
D. 31.25 mA
ANS : D
Question No. #23. If one of the resistors in a parallel circuit is removed,
the total resistance
A. decreases
B. increases
C. remains the same
D. doubles
ANS : B
Question No. #24. Six resistors are in parallel. The two lowest-value
resistors are both 1.2 kΩ. The total resistance
A. is less than 6 kΩ
B. is greater than 1.2 kΩ
C. is less than 1.2 kΩ
D. is less than 600 Ω
ANS : D
Question No. #25. The following currents are measured in the same
direction in a three-branch parallel circuit: 200 mA, 340
mA, and 700 mA. The value of the current into the junction
of these branches is
A. 200 mA
B. 540 mA
C. 1.24 A
D. 900 mA
ANS : C
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