A resistor is used as the heating element in an egg incubator. During a test, it dissipates 5.0 W when the current in it is 0.50 A. The current is then increased to 1.5 A, and the resistance stays the same. What power does the resistor dissipate now?
45 W45\ \mathrm{W}45 W
15 W15\ \mathrm{W}15 W
5.0 W5.0\ \mathrm{W}5.0 W
22.5 W22.5\ \mathrm{W}22.5 W
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.