hijn
contestada

A battery is connected in series with an ammeter and a variable resistor R.
When R= 6.0 ohms, the current in the ammeter is 1.0 A. When R= 3.0 ohms, the current is 1.5 A.
Calculate the internal resistance of the battery.

A. 6.0 ohms
B. 1.5 ohms
C. 4.5 ohms
D. 3.0 ohms