An electric heater rated 220V and 2.2 kw works for 3 hours. Find the energy consumed and the current drawn by it.
1 Answer
Here, Voltage ( V) = 220 V
power ( P) = 2.2 kw = 2200 watt
time ( t) 3 hours
energy consumed ( E) = ?
current (I) = ?
We have, P = \(\frac Et\)
E = P * t = 2200 *3 = 6600 watt hours = 6.6 unit
we know, 1 kwh = 36 * 105 Joules
= 237.6 * 105 joules
Again , I = \( \frac PV \)
\(\frac{2200}{220}\)
= 10 A
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