Experiment Description

Experiment

Experiment E07    Measuring Resistance Using V-A Method and Multimeter

Objectives
  • Study the method using a voltmeter and an ammeter to measure resistance.
  • Verify the results using an ohmmeter.
  • Critically choose the best arrangement of meters to measure a high resistance and a low resistance.
  • Learn the proper use of multimeter.
Description
In this activity, you will measure both high and low resistance using two different V-A methods. You will learn to choose the best one for a particular resistance.

In Experiment 1, you will measure a low resistance using two different arrangements of ammeter and voltmeter. In each setup, you will calculate the resistance using two ways: 1. Apply the definition directly, 2. Plot the data on a graph and obtain the slope.

Experiment 2 repeats Experiment 1 but using a high resistance. Again, two different arrangements of ammeter and voltmeter will be used. You will calculate the resistance using two ways: 1. Apply the definition directly, 2. Plot the data on a graph and obtain the slope.
Apparatus
low resistance resistor (~1 ohm) labelled as "Low" [1]
high resistance resistor (~15 kOhm) labelled as "High" [1]
rheostat (0 - 20 ohm) [1]
variable resistor (0 - 50 kOhm) [1]
battery box with 3 cells [1]
ammeter (1 mA, 10 mA, 100mA and 1 A) [1]
voltmeter (10 mV, 100 mV, 1 V and 5 V) [1]
multimeter [1]
switch [1]
Experiment