This introduction covers The Expensive Shower within Electrical Power & Energy for GCSE Physics. Revise Electrical Power & Energy in Electricity for GCSE Physics with 15 exam-style questions and 30 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 1 of 15 in this topic. Use this introduction to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 1 of 15
Practice
15 questions
Recall
30 flashcards
⚡ The Expensive Shower
An electric shower uses about 9000 W — that's 9000 joules EVERY SECOND! A 10-minute shower transfers 5.4 million joules. Meanwhile, your phone charger at 5 W uses just 5 joules per second. Leave it plugged in all day (86,400 seconds) and it transfers only 432,000 joules — less than a tenth of one shower! This is why power ratings matter for electricity bills. High power appliances used frequently are what cost you money.