Question

An electric heater takes 6A current from a 230V supply line,calculate the power of the heater and electric energy consumed by it in 5 hours.​

Answer 1

The power of an electric heater is 1380 watts and electric energy consumed by it in 5 hours is 6.9 kWh.

Explanation:

Given that,

Current in an electric cheater, I = 6 A

Voltage, V = 230 V

Time, t = 5 hours

The power of an electrical appliance is given by :

$P=V\times I$

$P=230\times 6$  

P = 1380 watts

Let E is the electrical energy consumed per unit time is called its electrical power. It is given by :

$P=\dfrac{E}{t}$

$E=P\times t$

$E=1380\times 5$

E = 6900 joules

or

E = 6.9 kWh

So, the power of an electric heater is 1380 watts and electric energy consumed by it in 5 hours is 6.9 kWh. Hence, this is the required solution.

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