Question

Why does the light of a car dim when the starter is operated?

• A. The starter motor draws a large current resulting in a large potential drop in the battery, which reduced the thermal voltage of the battery.
• B. When starter motor is switched on, it increases the resistance of the filament of the bulb in the car light.
• C. When the starter motor is switched on, it reduces the emf of the battery.
• D. The starter motor produces fumes, which absorb a part of the light of the car lamp.

Answer 1

The correct option is A The starter motor draws a large current resulting in a large potential drop in the battery, which reduced the thermal voltage of the battery.

Since, the starter motor draws a large current resulting in a large potential drop in the battery, which reduced the thermal voltage of the battery hence, the light of a car are dim when the starter is operated.