Four cells each of EMF 2V and internal resistance 0.1Ω are connected in series. The combination is connected in series to an ammeter of negligible resistance, a 1.6Ω resistor and an unknown resistor R1. The current in the circuit is 2A. Draw a labelled circuit diagram for the arrangement and calculate the: (a) value of R1. (b) potential difference across R1 [5 MARKS]

Four cells each of EMF 2V and internal resistance 0.1Ω are connected

1.	Four cells each of EMF 2V and internal resistance 0.1Ω are connected in series. The combination is connected in series to an ammeter of negligible resistance, a 1.6Ω resistor and an unknown resistor R1. The current in the circuit is 2A. Draw a labelled circuit diagram for the arrangement and calculate the: (a) value of R1. (b) potential difference across R1 [5 MARKS]
Answer» Four cells each of EMF 2V and internal resistance $0.1 Ω$ are connected in series. The combination is connected in series to an ammeter of negligible resistance, a $1.6 Ω$ resistor and an unknown resistor $R_{1}$ . The current in the circuit is 2A. Draw a labelled circuit diagram for the arrangement and calculate the: (a) value of $R_{1}$ . (b) potential difference across $R_{1}$ [5 MARKS]