The current rating of the fuse was too high.
The current was too large.
The lamp was loose.
The voltage was too small.
To increase the circuit resistance
To keep the power used to a minimum value
To prevent a short-circuit from occurring
To stop the cables from carrying too much current
The cable gets hot and causes burns.
The circuit-breaker cuts off the current.
The current passes through water and causes a shock.
The tool rusts.
A fuse is included in a circuit to prevent the current becoming too high.
A fuse should be connected to the neutral wire in a plug.
An electric circuit will only work if it includes a fuse.
An earth wire is needed to prevent the fuse blowing.