The diagram below shows part of a circuit:

If this arrangement of three resistors was to be replaced by a single resisitor, its resistance should be
$(a) 9 Ω (b) 4 Ω (c) 6 Ω (d) 18 Ω$

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Solution

a) two 6 ohms in parallel gives 3 ohm

3 + 6 = 9 ohm

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The diagram below shows part of a circuit: If this arrangement of three resistors was to be replaced by a single resisitor, its resistance should be (a)9Ω(b)4Ω(c)6Ω(d)18Ω

a) two 6 ohms in parallel gives 3 ohm 3 + 6 = 9 ohm

The diagram below shows part of a circuit:

If this arrangement of three resistors was to be replaced by a single resisitor, its resistance should be
$(a) 9 Ω (b) 4 Ω (c) 6 Ω (d) 18 Ω$

a) two 6 ohms in parallel gives 3 ohm

3 + 6 = 9 ohm