JAMB - Physics (2005 - No. 29)
A car battery rated 45 A H is charged with a charger whose rating is 2.5A.How long will it take to charge the battery full?
10 hrs
18 hrs
20 hrs
25 hrs
คำอธิบาย
For a car battery rated 45 AH, being charged by a charger of 2.5 A rating, the time for the battery to be fully charged is given by:
T = (45)/2.5 = 18 hrs
T = (45)/2.5 = 18 hrs