Question

When a motor car is started its headlight becomes slightly dim why?

Answer 1

Answer:

Because some of the energy is used to produce movement, and sound as well as heat. Less energy is then available to produce light, causing the headlights to dim.

Explanation:

Answer 2

Question: When a motor car is started its headlight becomes slightly dim. Why?

Solution: Initially, the starter draws a high current from the battery. This causes a large voltage drop across the internal resistance of the battery. Consequently, the potential difference across the terminals of the battery is reduced, thereby making lights dim.