Energy and Voltage in Circuits
3 marks · NormalA current of 0.8 A flows through a wire for 30 seconds. Calculate the total charge that passes through the wire. Include units in your answer.
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24 C (±0.5)
Common mistakes: Wrong unit; Math error in multiplication
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Marking points
M1 · 1 mark · Recalls or uses the equation Q = I × t.
M2 · 1 mark · Correct substitution: Q = 0.8 A × 30 s.
A1 · 1 mark · Obtains final answer with correct unit: 24 C.
Worked solution