V₁, V₂ and V₃ are the p.ds. across the 1Ω, 2Ω and 3Ω resistors in the following diagram, and the current is 5 A.

Which one of the columns (a) to (d) shows the correct values of V₁, V₂ and V₃ measured in volts?

V₁ V₂ V₃

(a) 1.0 2.0 3.0

(b) 5.0 10.0 15.0

(c) 5.0 2.5 1.6

(d) 4.0 3.0 2.0

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Solution

(b) V₁ = 5, V₂= 10 and V₃= 15
Because V = IR, the net voltage can be obtained by multiplying current with resistance.

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