An electrical appliance is connected to the mains supply using a standard three-core cable containing a fuse.
What colour is the insulation covering the neutral wire in a three-core mains cable?
A fuse wire melts to break the circuit when a charge of 1.5 C1.5\text{ C}1.5 C flows through it in 250 ms250\text{ ms}250 ms. Calculate the current in the fuse wire.
When the fuse wire reaches its melting point, an additional energy of 0.84 J0.84\text{ J}0.84 J is needed to melt it completely.
The specific latent heat of fusion of the fuse wire is 75 kJ/kg75\text{ kJ/kg}75 kJ/kg.
Calculate the mass of the fuse wire.
If some energy is transferred from the wire to the surroundings during heating, state how the time taken for the wire to melt would change and explain why.
Practise AQA GCSE Physics Domestic uses and safety with exam-style questions for Foundation and Higher tier. 13 questions covering Direct and alternating potential difference and Mains electricity, matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.