Final Answer:
When a light bulb operates at 100% efficiency (option c), all supplied energy is transformed into both light and heat without any energy loss, maximizing its utilization for illumination and heat production.
Step-by-step explanation:
When the efficiency of a light bulb is 100%, it means that all the energy supplied to the bulb is completely utilized. In this scenario, the energy supplied is transformed into both light and heat.
To understand this, consider the concept of energy conservation. When electricity passes through a light bulb, the electrical energy is converted into both light and heat energy. In an ideal situation where the bulb is 100% efficient, all the supplied energy is fully utilized, resulting in the conversion of electrical energy into both light and heat with no energy loss.
Mathematically, if E is the total energy supplied to the light bulb and 100% efficiency is denoted as η = 100%, then all the supplied energy (E) is converted into useful outputs (light and heat). Hence, in this case, the energy is transformed into both light and heat, making option c) the correct choice. This signifies that none of the energy supplied is wasted or lost in an ideal 100% efficient light bulb.
Therefore, when a light bulb operates at 100% efficiency, it optimally converts all the supplied energy into light and heat without any energy loss, illustrating a balanced transformation of energy into useful outputs.so the correct option is c.