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A teacher plugs an electric kettle into the domestic electricity supply - OCR Gateway - GCSE Physics - Question 7 - 2023 - Paper 4

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A teacher plugs an electric kettle into the domestic electricity supply. The kettle has a power rating of 2300W. What is the current in the kettle? Use the Equati... show full transcript

Worked Solution & Example Answer:A teacher plugs an electric kettle into the domestic electricity supply - OCR Gateway - GCSE Physics - Question 7 - 2023 - Paper 4

Step 1

What is the current in the kettle?

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Answer

To find the current ( I ) in the kettle, we can use the power formula:

P=VIP = VI

where:

  • PP is the power (in watts) = 2300 W
  • VV is the voltage (domestic electricity supply = 230 V for the UK)
  • II is the current (in amperes)

Rearranging the formula to solve for current:

I=PVI = \frac{P}{V}

Substituting the known values:

I=2300230=10AI = \frac{2300}{230} = 10 A

Therefore, the current in the kettle is 10A.

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