In case of power failure, a battery is used to light a bulb, run a fan, and heat an electric iron (each of 100 W rating) for 10 minutes. In this operation, the work done W and heat supplied Q by the battery are-
1
W = 0, Q = 0
2
W = 180 kJ, Q = 0
3
W = 60 kJ, Q = 120 kJ
4
None of the above