Introduction to Electricity
Objectives
The objectives of this lab are: Read a circuit, Build a circuit and Measure a circuit.
You are going to learn how to:
a) Read a simple circuit
b) Use a Multimeter to measure the Resistance ( Ohm), Voltage ( V ) and Current ( A)
c) Use a Power Supply
d) Build a simple circuit
e) Measure the circuit
Materials
Power supply, two cables attached with clips, multimeter and resistors.
Procedures
1) Measure the resistance of 4 different resistors given by the professor.
Place one cable in the Common port of the multimeter and the other cable in the Resistance
port.
2) Build the following circuit: A single resistor R =
330 ohms connects with a power supply of 5
volts. Make sure that the ends of R are not in the
same conducting line, or it will cause a ‘short
circuit’, the resistance will become zero and the
current passing the power supply will become
too large and burn the meter.
3) Measure the voltage V across the the resistor R.
Set the voltage from the power supply to 5 volts
by dialing the knob and read the multimeter
which is set at DC 20 volts.
4) Measure the current I passing through the
resistor.
The Multimeter should be switched to 200 mA
and must be in series with the resistor. To
achieve that, first disconect the circuit and place
one cable in the Common port of the multimeter
and the other cable in the Current port.
5) Let each member of your group practice the above procedures.