The circuit shown in the picture has four resistors R1=18 Q, R2=15 Q, R3=21 Q and R4=19.1 9 connected to the battery providing potential difference 6. The current through the resistor R4 is 0.2 A. What is the total potential difference provided by the battery? Provide your answer in volts, in precision of one decimal place. Figure below shows electric potential measured across a resistor as a function of current through it. The resistor is L=2.03 m long and has a radius r=0.28 mm. What is the resistivity of the material? 0.4 035 y = 24.2x _..--' 0.3 . 0.25 ..-"' Voltage [V] O N O 0.15 . 0.1 .I 0.05 . 0 0.005 0.01 0.015 Current [A] Provide your answer in microohms-meters (\"Q - In) with a precision of three places after the decimal