A heater wire whose power is 4kw is connected to 220v source. Calculate the electric current in the circuit.

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Solution

Here, $P = 4 k W = 4000 W$
$V = 220 V$
$I = ?$
Now using the formula for electric power,
$P = V I$
We get,
$4000 = 220 \times I o r, I = \frac{4000}{220} = 18.18 A$

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