Charging Mobile Phones
Electricity and Magnetism
Level
2
Max’s cell phone has exactly 10% battery life left. He knows it takes 2 hours to fully recharge it from there.
After the charge begins, when will his phone have exactly 55% of battery life left?
Details and Assumptions:
- Neglect battery drainage and running apps during phone charging.
- The voltage of the charger is constant throughout the time.
by
Michael Huang