A heater of resistance is connected to a supply. What is the power consumed (in W)?

Answer and explanation

Correct answer: C. 24

  1. Step 1: Note the given electrical values: supply potential difference and heating element resistance .
  2. Step 2: Use Joule's power relationship in terms of voltage and resistance: .
  3. Step 3: Calculate the electrical power consumed: .
Answer
24.

Practise more Current electricity.

Free questions with an explanation for every one, and full timed Cambridge IGCSE mock tests.

All Current electricity questionsTake a mock test

More Current electricity questions

Revise with flashcards