ELECTRICAL RESISTANCE
2 marks · EasyA buzzer in a circuit is connected to a 6 V battery and the current flowing is 0.5 A. Calculate the resistance of the buzzer. Give your answer with the correct unit.
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12 Ω (±0.2)
Common mistakes: 1.2 Ω; 0.12 Ω
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Marking points
M1 · 1 mark · Uses the formula V = I × R or rearranges to R = V / I.
A1 · 1 mark · Correct answer: 12 Ω.
Worked solution
Substitute in the values: R = 6 / 0.5 = 12 Ω