3-81L2 B
The tachometer of a building's elevator circuit experiences interference caused by the radio system nearby. What is a common potential "fix" for the problem?
A. Replace the tachometer of the elevator.
B. Add a .01 µF capacitor across the motor/tachometer leads.
C. Add a 200 µF capacity across the motor/tachometer leads.
D. Add an isolating resistor in series with the motor leads.
