Question

(Speed ), W highest speed setting across the 12.o V battery. Show the work that tells you that the motor's resistance equals 667 m2 (milliohms). Switched 12 i Blower Motor 80 m o) (6 points] Complete this table of total resistance (motor plus resistors) in the circuit, in milliohms, and current through the motor, in amperes, for each of the speed settings. 50 mD 1.960 Speed settingTotal Resistance, m2Motor Current,A 2 Speed 1 Speed 2 Speed 3 Speed 4 667 18.o

Answer 1

Voltage source, V = 12 v Resistance of motor, is R_motor = 667 m Ohm speed setting 1 for this, Total resistance is given by R_Total = R_motor + 180 m Ohm + 360 m Ohm + 1.96 Ohm = 3.167 Ohm or, R_Total = 3167 m Ohm Now, motor current is I_motor = V/R_Total = 12/3.167 = 3.79 A speed setting 2: - R_Total = R_motor + 180 m Ohm + 36 m Ohm = 1207 m Ohm R_Total = 1207 m Ohm Now, motor current is I_motor = V/R_Total = 12/1.207 = 9.94 A speed setting 3 R_Total = R_motor + 180m Ohm = 847 m Ohm and motor current is given by I_motor = 12/ 0.847 = 14.17 A