Establish a relationship to determine the equivalent resistance R of a combination of three resistors having resistances `R_1, R_2 and R_3` connected in series.
(b) Calculate the equivalent resistance R of a combination of three resistors of `2 Omega, 3 Omega and 6 Omega` joined in parallel.

Explanation

(b) Here `R_1=2 Omega, R_2=3 Omega and R_3=6 Omega`
The equivalent resistance R for parallel combination of resistors will be
`1/R=1/R_1+1/R_2=1/2+1/3+1/6=1/1 implies R=1 Omega`