A resistor of `10kOmega` has a tolerance of 10% and another resistor of `20kOmega` has a tolerance of `20%`. The tolerance of the series combination is rearly

Options

A. `10%`
B. `20%`
C. `15%`
D. `17%`

Explanation

(d) `r_(1)=10kOmega, Delta r_(1)=10/100xx10=1kOmega`
`r_(2)=20kOmega,Delta r_(2)=20/100xx20=4kOmega`
Maximum tolerance`=Delta r_(1)=Delta r_(2)=1+4=5`
`r_(1)+r_(2)=10+20=30kOmega`
% age of tolerance `=5/30xx10=16.67%=17%`