AC generator ground- fault interrupter circuit breaker sensing coil iron ring magnetic field lines 9. Figure 14 shows a ground-fault interrupter, inserted for safety between the power outlet and an appliance such as a clothes dryer. The ground-fault interrupter consists of an iron ring, a sensing coil, and a circuit breaker. The circuit breaker interrupts the circuit only if a current appears in the sensing coil. (a) The circuit breaker will not interrupt the circuit if the dryer is operating normally. Explain why. (b) If a wire inside the dryer touches the metal case, charge will pass through a person touching the dryer instead of going back through the ground-fault inter- rupter. How does the interrupter protect the person? (c) Should all electrical devices be plugged into ground- fault interrupters? If so, why? If not, why not? heater element Figure 14 Schematic of a ground-fault interrupter (for question 9)