Monday, 20 May 2019

Parallel Circuit - 5

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-5.


29. In a parallel resistive circuit:
A.        there is more than one current path between two points
B.        the voltage applied divides between the branches
C.        the total branch power exceeds the source power
D.        the total circuit conductance is less than the smallest branch conductance

Answer: A

30. What is the total resistance?

a)  7 k
b)  1 k
c)  706
d)  353

Answer: D

Explanation: Use Parallel Circuit Equation and find Req

31. Kirchhoff's current law for parallel circuits states that the:
a)  sum of all branch voltages equals zero
b)  total circuit resistance is less than the smallest branch resistor
c)  sum of currents into a junction is equal to the difference of all the branch currents
d)  sum of the total currents flowing out of a junction equals the sum of the total currents
     flowing into that junction

Answer: D

32. Which component is open?

a)  R1
b)  R2
c)  R3
d)  R4

Answer: C

33. If 550 mA of current leaves a node that had 250 mA entering from one branch, how
      much current would enter from the other?
a)  250 mA
b)  300 mA
c)  550 mA
d)  800 mA

Answer:  B

34. What procedure should be followed when troubleshooting with an ammeter or
      voltmeter?
a)  Short the leads and adjust.
b)  Check the meter’s external power supply.
c)  Start with the highest scale and adjust down to a lower scale.
d)  Start with the lowest scale and adjust up to a higher scale.

Answer: C

35. A parallel circuit is also used as a divider for:
a)  conductance
b)  voltage
c)  current
d)  power

Answer: C

 

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