CellPhone Battery Question? Cell Phone Battery As great as smartphones are, one

Question

CellPhone Battery Question?

Cell Phone Battery As great as smartphones are, one of their main drawbacks is that their batteries don't last a very long time. A Google Pixel, under somewhat regular usage conditions (internet, a few cat videos, etc.) uses 0.4W of power. We will model the battery as a voltage source (which, as you know, will maintain a voltage across its terminals regardless of current through it) with one caveat: they have a limited amount of charge, or capacity. When the battery runs out of charge, it no longer provides a constant voltage, and your phone dies Typically, engineers specify battery capacity in terms of mAh, which indicates how many mA of current the battery can supply for one hour before it needs to be recharged. The Pixel's battery has a battery capacity of 2770mAh and operates at a voltage of 3.8V

Explanation / Answer

Energy used in one time charging = VI = (2770/1000)*3.8= 10.53 J

In July it will be charged 31 times so energy used = 31*10.53= 326.3 J

$0.12 for 3600000 J

So for 326.3 J = (0.12/3600000)*326.3 = $ 1.08*10^(-5) ( ans)

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.