Students will switch their LED test light/torch ON/OFF by using each of the following methods:

1. Task 1. Create a series circuit using torch and two test leads.
   1. Check that torch is turned ON when circuit is 'closed“
      1. Add a reed switch to the circuit and move the two parts of the reed switch away from each other (as shown in image 1.)
      2. Connect the leads as shown in image 1. below (connect alligator clips to NO & COM terminals on the reed switch)
      3. Move the magnet towards the switch to turn the torch ON
      4. Experiment by moving the magnet away from and towards the reed switch
      5. What is the maximum distance between the magnet and the switch before the switch stops working? Write down your results
      6. Remove test leads and reed switch before re-connecting the supplied push-button switch to base of test light/torch.
      7. Is distance the only factor? Try turning the magnet when LED is on and see if the position of the magnet has an effect (not just the distance between the magnet and switch) Write down your comments.

1. Reed Switch - Connect test leads to NO & COM - Move magnet close to see light go ON

1. Task 2. Connect the leads as shown in image 2. below (connect alligator clips to NC & COM terminals on the reed switch)
   1. Look closely at how the leads are connected and check that your alligator clips are connected correctly
      1. Move the magnet towards the switch to turn the torch ON
      2. Experiment by moving the magnet away from and towards the reed switch

1. What is the maximum distance between the magnet and the switch before the switch stops working? Write down your results.
2. Remove test leads and reed switch before re-connecting the supplied push-button switch to base of test light/torch.
3. Is distance the only factor? Try turning the magnet when LED is on and see if the position of the magnet has an effect (not just the distance between the magnet and switch) Write down your comments.