Three cylindrical resistors are weld together and connected with a 12 V battery in series. The resistivity ρ1= 10 Ω∙ m, ρ2= 22 Ω∙ m and ρ3= 8 Ω∙ m. The length of three resistors are L1= 10cm,L2 =5cmandL3=12cm.Theradiusofthreeresistorsarer1=2cm,r2=6cmandr3 =4 cm. What is the electric power P2 of No 2 resistor when the circuit is running?

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