Dave MW

Help - I know this is a schoolboy question, but I have just bought a few bits and peices from Maplins to show my 6 year old the basics of a circuit. A simple 6 volt battery pack, wire, switch and a 6v .1 amp bulb in a holder. I used a multimeter to test the circuit which showed .1 amp current, 6.35 volts and 8.3 ohms resistance - Ohms Law would suggest that the resistance should have read 63.5 ohms. I don't know who is more confused - my son or me. Can anyone help?