Resistors and are connected in series across a source

PHYSICS · Single correct · CBSE · Physics · Electricity · Electricity

Problem

Resistors

R_{1}=4\,\Omega

and

R_{2}=6\,\Omega

are connected in series across a

24\,\text{V}

source. A third resistor

R_{3}=12\,\Omega

is then connected in parallel with this series combination, the supply voltage remaining

24\,\text{V}

. Approximately by what percentage does the total power consumed by the circuit increase? (a)

55\%

(b)

80\%

(c)

100\%

(d)

40\%