Question 1 Report
In the diagram above, a 200 W bulb is lighted by a 240 V a.c mains supply. If 1kwh is sold at ₦40, the cost of keeping the bulb lighted for a day is
Answer Details
Energy consumed = power x time = 200W x 24hr = 4800wh = 4.8 kwh But 1 kwh cost N40 ∴ 4.8kwh costs 4.8 x 40 = N192