Repulsion between Magnets

Aim: To study the repulsive force between two magnets

Apparatus used in the experiment: Weighing machine, 2 Neodymium magnets, acrylic tube, Nylon rod, measuring scale.

Apparatus to be used by you: 15cm or 30cm ruler.


  • Two neodymium magnets are placed on the weighing machine in the repulsive mode using acrylic pipe and nylon rod.
  • The “TARE” button is pressed before beginning the experiment.
  • In order to decrease distance between the magnets, nylon rod is used to push down the upper magnet.
  • Reading on weighing machine are in “g” for all the videos and images.
Setup for the experiment
  • Observe the video given below.
  • Generate the data for force (F) between the magnets as the distance (x) between them changes.
  • Make the measurements with 2% uncertainty in the measured data and comment on the method used for the same.
  • Use the following photographs to generate the data
  • Plot a suitable graph to determine the relation between the force and the distance between the two magnets.


In order to get your response, we are providing you with a google form. So that, we can get an idea about

  1. your data collection techniques,
  2. variables chosen for measurements,
  3. your data and
  4. the graphs that you will plot.

The google form:

Use the spreadsheet for calculations if needed: spreadsheet

You may download the graph sheet to plot the graph: Graph Sheet


What is meant by 1% uncertainty in the measurement of data?

When we say that we want to measure a variable, y with 1% uncertainty, it means that

It means that the measured quantity is at least 100 times the least count.

%d bloggers like this: