An automobile battery has an emf of 12.60 V and an internal resistance of 0.076 0 ?. The headlights together have an equivalent resistance of 6.400 ? (assumed constant).
(a) What is the potential difference across the headlight bulbs when they are the only load on the battery? (Give your answer to four significant figures.)
__________ V
(b) What is the potential difference across the headlight bulbs when the starter motor is operated, requiring an additional 35.0 A from the battery? (Give your answer to four significant figures.)
_______________ V