ELECTRICAL RESISTANCE

1 mark · Easy

Which of the following circuits would have the greatest total resistance?

Three circuits showing resistors in series and in parallel.

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Correct option: Two 5 Ω resistors in series with a cell

Common mistakes: A single 10 Ω resistor in series with a cell; Two 5 Ω resistors in parallel with a cell

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Marking points

B1 · 1 mark · Chooses correct answer: two 5 Ω resistors in series (total 10 Ω, but two in parallel would be 2.5 Ω).

Worked solution

Two 5 Ω resistors in series give a total resistance of 5 Ω + 5 Ω = 10 Ω, the highest among the options.