Question

A light bulb converts electrical energy into light energy and also some thermal energy. The amount of electrical energy is 50 Joules before the conversions. What is the total amount of energy from before the conversions to after the conversions?

Answer 1

If the amount of electrical energy is 50 Joules before the conversions, then it would be 50 Joules after the conversion.

According to law of conservation of energy, we cannot create or destroy energy so it remains constant

Hope this helps!