Question

To increase the effective resistance register have to be connected in

Answer 1

series combination

Explanation:

by perfoming illustration i will prove it:

let r1=5and r2=7

the net resistance(in series combination) =r1+r2=5+7=12

the net resistance(parallel combination)=1/r1+1/r2=1/5+1/7=

12/35=1/r(net)

35/12=2.987