PROBLEM:

A typical 12-volts battery is rated according to "ampere-hrs". A 70-Ampere-hour battery for example, at a discharge rate of 3.5-Ampere has a life of 20 hrs.

Questions:
a.) assuming the voltage remains constant, obtain the energy and power delivered.

b.) Repeat for a discharge rate of 7.0 Ampere
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Please provide solution, so that i can figure out to arrive at the solution, Thanks in advance!

God Bless...

1 answer

V=voltage, 12v
I=current, 3.5 amp.
T=time of discharge in seconds = 20 hours=20*3600 seconds

Energy delivered, = VIT joules

Same idea for other discharge rates.