Question

a battery has a capacity of 25ah if it is fully charged state and if all of its charge is completely discharge at 5 c

Answer 1

you mean, A battery has a capacity of 25ah if it is fully charged state and if all of its charge is completely discharge at 5C/s rate it will complete its discharge in approximately.

solution: capacity of battery , $Q_0$ = 25Ampere.hour = 25Ampere.(3600sec)

= 25 × 3600 coulombs [ as we know, 1Ampere. sec = 1 coulomb ]

= 9 × 10⁴ C

given, rate of discharging of battery is 5C/s.

then after time , t = total charge in battery/rate of discharging

= 9 × 10⁴ C/5C/s

= 1.8 × 10⁴ sec

= (18000/3600) hours

= 5 hours.