The battery for a certain cell phone is rated at 3.70 V. According to the manufacturer it can produce 3.00×104J of electrical energy, enough for 5.00 h of operation, before needing to be recharged. Find the average current that this cell phone draws when turned on.

Current, I = 0.45 A

Explanation:

Voltage of the battery for a certain cell phone, V = 3.7 A

Electrical energy produced by the cell phone,

Time, t = 5 hours = 18000 seconds

The electrical power is given by the electrical energy produced per unit time as :

No using the formula of power as :

I is current

So, the average current that this cell phone draws when turned on is 0.45 A.