The local loop has a resistance of 650 ohms and the telephone instrument has a ringer voltage of 80 volts when the voltage at the central office is 100 V. Calculate the impedance of the ringer in the telephone.

The local loop has a resistance of 650 ohms and the telephone instrument has a ringer voltage of 80 volts when the voltage at the central office is 100 V. Calculate the impedance of the ringer in the telephone.

The local loop has a resistance of 650 ohms and the telephone instrument has a ringer voltage of 80 volts when the voltage at the central office is 100 V. Calculate the impedance of the ringer in the telephone.