Commercial Electrical Energy
An electrical appliance uses a lot of electric energy when it is operated e.g., geysers heaters etc. The electrical energy consumed is dependent on the time for which a specific appliance of fixed power rating is used. However, the energy used in hour is denoted as `1 kWh=3.6 xx 10^6` joule. This is represented as 1 unit. Different electrical appliance have difference power consumption which is mentioned on the device clearly.
The wires used in heating element are different than the connecting wires. The connecting wires uses copper but heating element does not because
Options:
(a) copper is expensive
(b) copper heats very fast
(c) copper is poor conductor of heat
(d) copper has very low resistivity