Question

An electric heater consumes 50J of energy in 6 hours. Find its power.​

Answer 1

The rate of doing Work or the rate of transmission of Energy is called Power.

Here,

$P = \frac{∆E}{t}$

$P = \frac{50}{6} = 8.33 \times {10}^{ - 3} \: \frac{k W }{hr}$

If you want to calculate in Watts, simply convert time in seconds.

$p = \frac{50}{6 \times 60 \times 60} \\ \\ = > 0.0023 \: \frac{watts}{sec.}$

Hope this helps !