e&m.jpg (12862 bytes)

PHASE RELATIONSHIP OF CURRENT AND VOLTAGE IN AN INDUCTIVE CIRCUIT




EQUIPMENT
    wpeE.jpg (741 bytes) Demo Board with decade resistor and 3.5 mfd capacitor
    wpeF.jpg (741 bytes) Oscilloscope with TV camera
    wpe10.jpg (741 bytes) Audio Frequency Generator
    wpe11.jpg (741 bytes) Jumping Rings Solenoid (Coil)


NARRATIVE
        The current lags the voltage by 90 degrees in an inductive circuit.The Jumping Rings Solenoid (coil) is used for this demonstration. Connect the large coil in series with the audio frequency generator. Display the voltage on the oscilloscope. The trace represents the current in the coil. Connect the coil to the second input of the oscilloscope to display the induced voltage. Insert the small coil into the large coil noticing that the voltage waveform leads the current waveform by 90 degrees.