To explore the relationship between heat generated by current through resistor and current requires equipment: power supply, switch, wires, three flasks, sliding rheostat, three thermometers and three different heating wires, among which two heating wires A and B are different, two heating wires A and C are the same, and kerosene is appropriate. Steps. Connect the circuit as shown in the figure, inject kerosene with equal mass and initial temperature, close the switch, and after a period of time, observe the readings of thermometers A, B and C and record them.