- Joule's Law
- Practical Applications of Heating Effect of Electric Current
- Heating effect of electric current and its applications in daily life
- null - Heating Effect of Electric Current
An electric kettle rated at 220 V, 2.2 kW, works for 3 hours. Find the energy consumed and the current drawn.
An electric heater is connected to the 230 V mains supply. A current of 8 A flows through the heater.
(a) How much charge flows around the circuit each second?
An electric iron is connected to the mains power supply of 220 V. When the electric iron is adjusted at 'minimum heating' it consumes a power of 360 W but at 'maximum heating' it takes a power of 840 W. Calculate the current and resistance in each case.
The current passing through a room heater has been halved. What will happen to the heat produced by it?
Why are the coils of electric irons and electric toasters made of an alloy rather than a pure metal?
Two exactly similar heating resistances are connected (i) in series, and (ii) in parallel, in two different circuits, one by one. If the same current is passed through both the combinations, is more heat obtained per minute when they are connected in series or when they are connected in parallel? Give reason for your answer.