Parallel Circuit - 7

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.

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This set of Basic Electrical Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Parallel Networks” Set-7.

43. If two 4 Ohm resistors are connected in parallel the effective resistance of the circuit is:

(a)  8 Ohm

(b)  4 Ohm

(c)  2 Ohm

(d)  1 Ohm

Answer: c

44.  The effect of connecting an additional parallel load to an electrical supply source is to increase the:

(a)  resistance of the load

(b)  voltage of the source

(c)  current taken from the source

(d)  p.d. across the load

Answer: c

45.  The equivalent resistance when a resistor of 13 Ohm is connected in parallel with a  

     14 Ohm resistance is:

(a)  17 Ohm

(b)  7 Ohm 

(c)  112 Ohm

(d)  34 Ohm

Answer: a

46 A 10 Ohm resistor is connected in parallel with a 15 Ohm resistor and the

     combination in series with a 12 Ohm resistor. The equivalent resistance of the circuit 

     is:

(a)  37 Ohm

(b)  18 Ohm

(c)  27 Ohm

(d)  4 Ohm

Answer: b

47.  When three 3 Ohm resistors are connected in parallel, the total resistance is:

(a)  3 Ohm

(b)  9 Ohm

(c)  1 Ohm

(d)  0.333 Ohm

Answer: c

48.  The total resistance of two resistors R1 and R2 when connected in parallel is given by:

(a)  R1+R2

(b)  1 / R1+1 / R2

(c)  R1+R2 / R1R2

(d)  R1R2 / R1+R2

Answer: d

 

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