# AC Transformer

Objective

Demonstrate mutual induction using two coils, supplied with ExpEYES. One coil, the primary, is connected between WG and Ground. The axes of the coils are aligned and a ferrite core is inserted.begin_inset Separator latexparend_inset

Procedure

- Make connections as shown in the figure

- Enable A1 and A2

- Set WG to 500 Hz

- Bring the coils close and watch the voltage on A2.

- Try inserting an ion core

Discussion

The applied waveform and the induced waveform are shown in figure. A changing magnetic filed is causing the induced voltage. In the previous two experiments, the changing magnetic field was created by the movement of permanent magnets. In the present case the changing magnetic field is created by a time varying current.

Try doing this experiment using a squarewave. Connect a 1kΩ resistor across secondary coil to reduce ringing.

The concept of Alternating Current is introduced by plotting the voltage as a function of time. The behavior of circuits elements like capacitors and inductors in AC and DC circuits are explored, by measuring parameters like amplitude, frequency and phase. Converting electrical signals into sound and back is demonstrated.

For each experiment, make connections as per the diagram given.