The lamps in a set of Christmas tree lights are connected in series; if there are 20 lamps and each lamp has a resistance of 25 Ω, calculate the total resistance of the set of lamps, and hence calculate the current taken from a 230 V supply
The lamps in a set of Christmas tree lights are connected in series; if there are 20 lamps and each lamp has a resistance of 25 Ω, calculate the total resistance of the set of lamps, and hence calculate the current taken from a 230 V supply
