Answer :
Answer:
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, [tex]E=3\times 10^4\ J[/tex]
Time, t = 5 hours = 18000 seconds
The electrical power is given by the electrical energy produced per unit time as :
[tex]P=\dfrac{E}{t}\\\\P=\dfrac{3\times 10^4}{18000}\\\\P=1.67\ W[/tex]
No using the formula of power as :
[tex]P=V\times I[/tex]
I is current
[tex]I=\dfrac{P}{V}\\\\I=\dfrac{1.67}{3.7}\\\\I=0.45\ A[/tex]
So, the average current that this cell phone draws when turned on is 0.45 A.