ELECTRIC CHARGE
2 marks · NormalA current of 1.3 A flows for 15 seconds. Calculate the amount of charge transferred. Give your answer with the correct unit.
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Q = 1.3 \times 15 = 19.5\ \mathrm{C} C (±0.1)
Must show: Correct substitution, Correct unit
Also accept: Answer as 19.5 coulombs, or rounded to 20 C if significant figures
Common mistakes: Using wrong formula; Leaving out unit
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Marking points
M1 · 1 mark · Substitutes values into .
A1 · 1 mark · Correct answer: 19.5 C.
Worked solution
Use the formula . C.