Question

Find the resistance of an iPhone battery if it is a 5.0V charger at 2.1 A

Answer 1

2.38Ω

Step-by-step explanation:

We are given;

• Voltage as 5.0 V
• Current as 2.1 A

We are required to calculate the resistance of the iPhone battery;

• According to Ohm's law, the current through a conductor is directly proportional to the potential difference at constant temperature and pressure.
• That is; V = IR

• Rearranging the formula;

R = V/I

Therefore;

R = 5.0 V ÷ 2.1 A

= 2.38 Ω

Thus, the resistance of the iPhone battery is 2.38Ω