Question

Question 5 (a)
What is the highest total resistance that can be secured by combinations of four coils of resistance $4\Omega ,8\Omega ,12\Omega$ and $24\Omega$?

Answer 1

There are four coils of resistances $4\Omega ,8\Omega ,12\Omega$ and $24\Omega$ respectively.
(a) If these coils are connected in series, then the equivalent resistance will be the highest,.
When the resistances are connected in series, the equivalent resistance is given by,
$R=R_1+R_2+R_3+R_4$
$=4+8+12+24=48\Omega$.