The highest resistance that can be secured by a combination of four coils of resistance 4 Ω, 8 Ω, 12 Ω and 24 Ω is [[1]] Ω.

Solution:

The highest resistance that can be secured by a combination of four coils of resistance

4 Ω

8 Ω

12 Ω

and

24 Ω

48 Ω

.
It is known that the highest resistance is observed when the resistances are connected in series. It is so because, in series, the equivalent resistance is the sum of all the individual resistances. Therefore, the highest resistance is secured by combining all four resistance coils.
On substituting the given values; we get the highest resistance as

R = 4 + 8 + 12 + 24

R = 48 Ω

Hence, the highest resistance is

48 Ω

The highest resistance that can be secured by a combination of four coils of resistance $4 Ω$ , $8 Ω$ , $12 Ω$ and $24 Ω$ is [[1]] $Ω$ .

Solution:

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