Answer :
Answer:
12.27 h
Explanation:
Total power consumption by the car = 88 W
It has a battery of 12V and rating 90 A-h.
The full 12V appears across each bulb. We know that power is given by
[tex]P=Vi[/tex]
where, [tex]i[/tex] is the current flowing through the circuit.
So, in this case,
[tex]i=\frac{P}{V}=\frac{88}{12}A=7.3333A[/tex]
The rating in units of A-h is the amount of energy available in a battery that will allow a current of 1 A to flow in a circuit for 1 hour.
Naturally, the time for which the battery will last = [tex]\frac{90}{7.3333}h=12.27h[/tex]