Basic concepts : power & energy Electrical energy : kWh = kilo watt hour (joule)
Power (watt = joule / sec )
Q. If you have two bulbs of 80 watt & 60 watt then which bulb will give more light ?
Ans: 80 watt (joule / sec)
Power = the rate of transfer of energy from one form to another form
In a electric bulb electrical energy is converted in heat & light energy
Q. If you have two bulb of 200W & 100W when applied same rated voltage across them
Which bulb will have less resistance?
Ans = 200W bulb will have less reaiatance
Comment if you have any doubts
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