India Site

Explain how to find the resistance of a combination of three resistors of resistance R1, R2, and R3 connected in parallel using a labelled circuit diagram.

answer:

Total current = I = I1 + I2 + I3

from ohms law I = V/R,

I1 = V/R1

I2 = V/R2

I3 = V/R3

V/R = V/R1 + V/R2 + V/R3

1/R = 1/R1 + 1/R2 + 1/R3