Question

An electric bulb is marked 220v60w. An ammeter in the circuit shows the bulb uses a current of 0.2727A. The bulb burns for an hour. Calculate the following:

A. The electrical energy consumption
B. The cost for the bulb to burn for one hour if the cost of electricity is 17.45 cents per kWh.
2.determine the power rating of a stove if it releases 200kJ of heat energy for 4 minutes and 30 seconds
(a) 60W * 1 hr = 60 Wh
(b) .060 kWh * .1745 $/kWh = 0.01

200kJ/270s = 740W

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