Schematic

• A rotating magnet causes a rotating magnetic field also.
• Placing a coil in that field will induce a periodic voltage across it.

Instructions

• Use the DC motor to rotate the magnet. The coils are provided with ExpEYES.
• Make the connections as shown:
• The frequency of the induced AC will be the number of rotations per second of the magnet.
• When you use two coils, the phase difference between the two signals is decided by the angle between the axes of the coils.
• Adjust the time base to view 4 or 5 cycles