Figure 1 A 200 turn coil is wrapped around a ferromagnetic core. |

Lab 6 Faraday's Law

**Lab 6 Exercise**

The 60 Hz sinusoidal voltages contained in Table 1 were applied to the inductor shown in Figure 1.

Recall for an inductor,

The ratio of the voltage amplitude to the current amplitude is,

(1)

If,

then,

(2)

where the inductance,

(3)

where

(4)

- Plot the voltage as a function of current.
- Given that the frequency is 60 Hz, calculate the inductance for each current and voltage pair.
- Why does the inductance decrease at higher currents?