TOPIC:

ID Code: K3-01
Purpose: Demonstrate that a change in the primary current induces a secondary voltage.
Description: The 46-turn primary coil of a transformer is connected through a variable resistor to a 1.5 volt battery, and a large galvanometer is connected directly across the 500-turn secondary, as shown in the circuit diagram below. The primary current in this simple transformer is changed by sliding the variable resistor contact, inducing a secondary potential which is indicated by the galvanometer. Motion of the resistor slider and current in the galvanometer are correlated.
Availability: Available