Question

Power of an electric heater is $1000$ W and it is running for $1$ hour. Calculate the energy consumed by it

• A. $3.6$ MJ
• B. $1.2$ MJ
• C. $1.8$ MJ
• D. $4.2$ MJ

Answer 1

The correct option is A $3.6$ MJ

Power$=P=1000W$

$t=1h=3600s$

Power is energy consumed per unit time.

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

$⟹E=Pt$

$⟹E=3600\times 1000$

$⟹E=3.6\times {10}^{6}J$

Energy$=E=3.6MJ$

Answer-(A)