To determine its characteristics, connect the following circuit using a 200 W resistor and a small light bulb connected in series. Connect the ammeter in series with the light and resistor. Use the 2-20 V variable voltage supply. Have your instructor check the circuit before you turn on the power. Light bulb connected in series with 100 W resistor.
Voltmeter reads voltage across bulb.
Ammeter reads current through bulb. V b and the current through the circuit. Make sure the computer is set to single sweep. To obtain the current through the light bulb, take the voltage across the 100 W resistor. Since the resistor is an ohmic device, the voltage across it can be used to determine the current flowing in the circuit.