A negatively charged metal sphere stands on an insulating support. A student wants to discharge it. Which arrangement provides a continuous conducting path to Earth?
A copper wire connects the sphere to an isolated plastic block.
A nylon thread connects the sphere to an earthed metal pipe.
A copper wire connects the sphere to an earthed metal pipe.
A nylon thread connects the sphere to an isolated plastic block.
91 exam-style questions on Edexcel GCSE Physics 11.1 Charging by friction, covering 11.1.1 Charging insulators by friction, 11.1.2 Forces between charges, 11.1.3 Electrostatic phenomena, and 11.1.4 Earthing and removing charge. Each one has a worked solution and a mark scheme showing where the marks go.