The circuit diagram shows a cell with fixed internal resistance and an external resistor $R$. A student notes the ammeter and voltmeter values. She then adds a second identical external resistor in parallel with the first external resistor. What happens to the ammeter reading and to the voltmeter reading?
- Aammeter reading decreases; voltmeter reading decreases
- Bammeter reading decreases; voltmeter reading stays the same
- Cammeter reading increases; voltmeter reading decreases
- Dammeter reading increases; voltmeter reading stays the same