Get premium membership and access revision papers with marking schemes, video lessons and live classes.
Processing. Please wait.

 Form 4 Physics Mains Electricity Questions and Answers

A house has one 100W bulb, two 60W bulbs and one 30W bulb. Determine the cost of having all the bulbs switched on for 70 hours, given that the cost of electricity is 40 cents per kilowatt hour.

 (4m 2s)
552 Views     SHARE