The refrigerator is rated at 127 volts and draws 150 watts. What additional resistance must

The refrigerator is rated at 127 volts and draws 150 watts. What additional resistance must be connected to the refrigerator in order to connect it to the 220 V network?

Initial data: Uх (voltage for which the refrigerator is designed) = 127 V; P (power consumption of the refrigerator) = 150 W; U (voltage in the network to which the refrigerator is connected) = 220 V.

1) Current in the circuit: I = Iх = Ic = P / Uх = 150/127 = 1.1811 A.

2) Voltage at the additional resistance: Uс = U – Uх = 220 – 127 = 93 V.

3) The value of the additional resistance: Rc = Uc / I = 78.74 Ohm.

Answer: An additional 78.74 ohm resistance must be connected to the refrigerator.