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Could somebody explain to me why in a series circuit with 3 lights one at 4.2w , 60w and 50w only the 4.2W lamp will light up I understand that the current will be the same through out but I am a little confused thank you
Just to add to to Chris P's answer - presuming we're talking simple filament (incandescent) lamps - that the "cold" resistance will usually be significantly lower than it's normal working resistance (when it's perhaps a couple of thousand degrees hotter) - so the 50W and 60W lamps probably get an even lower share of the voltage in practice than calculations based on normal working conditions would suggest.
Just to add to to Chris P's answer - presuming we're talking simple filament (incandescent) lamps - that the "cold" resistance will usually be significantly lower than it's normal working resistance (when it's perhaps a couple of thousand degrees hotter) - so the 50W and 60W lamps probably get an even lower share of the voltage in practice than calculations based on normal working conditions would suggest.
