Parallel Circuit - 4

A Parallel circuit has certain characteristics and basic rules: A parallel circuit has two or more paths for current to flow through. Voltage is the same across each component of the parallel circuit. The sum of the currents through each path is equal to the total current that flows from the source.

This set of Basic Electrical Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Parallel Networks” Set-4.

22. The currents in the three branches of a parallel circuit are 3A, 4A and 5A. What is the current leaving it?
a) 0A
b) Insufficient data provided
c) The largest one among the three values
d) 12A

Answer: d

Explanation: The total current leaving a node is the same as the current that enters it. Total I=I1+I2+I3=3+4+5=12A.

23. The total resistance between A and B are?
 

 

 
a) 20 ohm
b) 5 ohm
c) 80 ohm
d) 0 ohm

Answer: b

Explanation: The resistors are connected in parallel, hence the equivalent resistance=

                                   (1/R=1/20+1/20+1/20)=5 Ohm

24. The voltage read by the voltmeter will be:

a)  24 V

b)  12 V

c)  6 V

d)  4 V

Answer: B

Explanation: In parallel circuit voltage remains same across the resistor,

25. What does I3 equal in the given circuit?

a)  5 mA

b)  45 mA

c)  50 mA

d)  100 mA

Answer: A

Explanation: I3 = V/R  =  9/1.8  =  5 mA

26. What is the total power of the circuit?

a)  2.2 W

b)  4.2 W

c)  6.2 W

d)  8.2 W

Answer: B

27. What are the individual values of two parallel resistors whose RT is 8 ohms, when

    one has double the resistance of the other?

a)  2.7 ohms and 5.3 ohms

b)  8 ohms and 16 ohms

c)  10 ohms and 20 ohms

d)  12 ohms and 24 ohms

Answer: D

28. When a parallel 5 k resistor and a 25 k resistor have a 10 V supply, what is the total

     power loss?

a)  2.4 mW

b)  3.3 mW

c)  24 mW

d)  33 mW

Answer: C

Explanation: Use Parallel Circuit Equation.



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