Read the passage carefully and answer the questions given below.
Rahul switches on an incandescent electric bulb in his study room. Within a few minutes, he observes that the bulb becomes extremely hot while producing light.
a. Why does the filament of an incandescent bulb become extremely hot?
The filament of an incandescent bulb become extremely hot because .
b. A current \(I\) flows through a resistor of resistance \(R\) when the potential difference across it is \(V\). Applying Ohm’s law, write the formula for amount of heat produced by the resistor in time \(t\).
c. Write any two practical applications of heating effect of electric current.
i.
ii.
d. Define the commercial unit of electric energy and express it in Joules (\(J\)).
The commercial unit of electric energy is the .