Practical: investigate the specific heat capacity of a substance

2 marks · Easy

In a specific heat capacity experiment, the heater is supplied with a voltage of 10 V and a current of 2.0 A for 5 minutes. Calculate the total energy supplied by the heater.

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6,000 J (±10)

Also accept: 6000

Common mistakes: not converting time to seconds; multiplying by 5 not 300

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Marking points

M1 · 1 mark · Uses correct formula: energy = voltage × current × time (follow-through)

A1 · 1 mark · Correct calculation: 10 × 2.0 × 300 = 6000 J (follow-through)

Worked solution

First, convert 5 minutes to seconds: 5 × 60 = 300 s. Energy supplied = V × I × t = 10 × 2.0 × 300 = 6000 J.