A circuit consists of a battery, a metal wire, an ammeter and a switch connected in series. The switch is closed and the ammeter reading noted. The metal wire is now heated.
- State the observation made on the ammeter reading and give a reason for your answer
- State the purpose of a fuse in a circuit.
- An electric heater is made of wire of resistance 100Ω and 2400 V mains supply. Determine
- Power rating of the heater
- Current flowing in the circuit