ZIMSEC O Level Combined Science Notes: Experiment: Demonstrating that an electric wire moves in a magnetic field
Aim: To demostrate how a current carrying wire moves in a magnetic field
Materials: a length of flexible wire, small pieces of cardboard to balance the wire, 2 strong magnets/horseshoe magnet, battery with 6V or more
Method
- Place the two magnets about 3 cm apart with the opposite poles facing each other or prop up the horseshoe magnet
- Support/Balance a length of wire between the two magnet poles using small pieces of cardboard folded into V shapes
- Connect the ends of the wire to a battery and switch
- Close he switch and observe the wire
- Open the sitch
- Connect the ends of the wire to different terminals so that current flows in the opposite direction
- Close the switch and observe the wire
- Open the switch
Observation and Results
- The wire moves/jerks if the circuit is closed by the switch
- If the terminals are switched the wire moves/jerks in the opposite direction
- The wire also moves in the opposite direction if the poles of the magnet(s) are switched
Conclusion
- A current carrying wire’s field and a magnetic field interact with one another to produce the motor effect
- The motor effect is used in making electric motors
- Which convert electrical energy into kinetic energy
To access more topics go to the Combined Science Notes page.