A washing machine is connected to a 230 V supply. At the start of a wash, its heating element warms the water. During this part of the wash, the machine transfers 2.07 × 106 J of energy in 900 s.
Calculate the current in the washing machine during this part of the wash. Use I=EVtI=\dfrac{E}{Vt}I=VtE.
Later in the wash, the drum starts to turn from rest. State which energy store of the drum increases.
State which energy store of the water increases while the heating element is switched on.
105 exam-style questions on Edexcel GCSE Physics 10.3 Electrical energy and power, covering 10.3.1 The heating effect of an electric current, 10.3.2 Reducing energy transfer in wires, 10.3.3 Advantages and disadvantages of the heating effect, 10.3.4 Energy transferred by an electrical circuit, 10.3.5 Electrical power, and 10.3.6 Energy transfers in domestic devices. Each one has a worked solution and a mark scheme showing where the marks go.