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Given ,
Potential difference (v) = 2.5 v
Current (I) = 750 mA or 750 × (10)^-3
Time = 4 Hr or 14400 sec
We know that , the product of potential difference and current is called electric power
Substitute the known values , we get
P = 2.5 × 750 × (10)^-3
P = 25 × 750 × (10)^-4
P = 18750 × (10)^-4
P = 1.8750 watt
We know that , the ratio of potential difference to the current is called resistance
Substitute the known values , we get
R = 2.5/0.750
R = 3.33 Ohm
We know that ,
Substitute the known values , we get
Energy = 1.8750 × 14400
Energy = 27000 joule
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