What happens if a battery cannot supply enough current? Let's say we're using a 10V battery capable of supplying 1A of current. A single resistor is then connected so that the current is flowing through it. Using V=IR, if the resistance is 10 Ohms, current is 1A. What if the Resistance is 5 Ohms, you'd need a 2A current for 10 V, but the battery is not capable of supplying that current. Does that mean the 10 V battery is only giving 5 V? And would the reading with a multimeter show 5 V?