Question 5:
What is (a) the highest, (b) the lowest total resistance that can be secured by
combinations of four coils of resistance 4 Ω , 8 Ω, 12 Ω, 24 Ω?
Answer:
There are four coils of resistances 4 Ω , 8 Ω, 12 Ω, and 24 Ω respectively.
(a) If these coils are connected in series, then the equivalent resistance will be the
highest, given by the sum 4 + 8 + 12 + 24 = 48 Ω
(b) If these coils are connected in parallel, then the equivalent resistance will be the
lowest, given by
Therefore, 2 Ω is the lowest total resistance.
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