Simple Calculation question (1 Viewer)

[ThreeOne]

calculate the number of 100W globes that could be on at the same time in a circuit which contains an 8A fuse.

Can someone do that for me with working out please?

I do have the answers to this question and it is as follows:

"from P=VI
100=240I
therefore I=0.42A through each globe
so 8= 0.42 x number of globes
so number of globes =19"

What I don't understand is how the the "240I" bit came about.

 

[rama_v]

calculate the number of 100W globes that could be on at the same time in a circuit which contains an 8A fuse.

Can someone do that for me with working out please?

I do have the answers to this question and it is as follows:

"from P=VI
100=240I
therefore I=0.42A through each globe
so 8= 0.42 x number of globes
so number of globes =19"

What I don't understand is how the the "240I" bit came about.

They are just saying V = 240 volts, which is the voltage used in Australian homes.