A 1 V cell with internal resistance 5 Ω and a 3 V cell with resistance 10 Ω are connected in series to an external resistor having resistance 15 Ω. What is the voltage across the external resistor?
1
1 V
2
2 V
3
2.5 V
4
3 V
5
Question Not Attempted
A 1 V cell with internal resistance 5 Ω and a 3 V cell with resistance 10 Ω are connected in series to an external resistor having resistance 15 Ω. What is the voltage across the external resistor?