CH22_PontilloB

Chapter 22toc

Virtual Lab: Electromagnetic Induction
12/6/11

Objective: Detect an induced current using a voltage meter. Summarize the relationship between the magnetic field of a magnet and the current induced in a conductor. Evaluate what factors affect the direction and magnitude of an induced current.

Hypothesis: To induce a current in a loop of wire a magnet must be brought in close distance to a coil of wire. Direction and magnitude of the induced current are influenced by changing the angle, area and field strength.



Data: 

Discussion Questions: 1. Based on your observations from the first part of the lab, did the speed of the motion have any effect on the galvanometer? Yes the way the galvanometer indicator needle deflects depends on the manner in which the coil of wire moves. The faster the coil of wire moves, the faster the galvanometer will respond.

2. In the first part of the lab, did it make a difference whether the coil or the magnet moved? It did not make a difference. In both cases, the voltage meter had the same reaction.

3. Explain what the voltage meter readings revealed to you about the magnet and the wire coil. The angular rotation of the voltage meter is proportional to the current through the coil.

4. Based on your observations, what conditions are required to induce a current in a circuit? The magnet or the circuit must be moving. The magnetic field strength will cause the flux, this will induce current.

5. Based on your observations, what factors influence the direction and magnitude of the induced current? The Angle, area, and magnetic field strength influence the direction and magnitude.

<span style="font-family: Arial,Helvetica,sans-serif; font-size: 90%;">Conclusion: <span style="font-family: Arial,Helvetica,sans-serif; font-size: 90%;">My hypothesis, “To induce a current in a loop of wire a magnet must be brought in close distance to a coil of wire. Direction and magnitude of the induced current are influenced by changing the angle, area and field strength,” was correct. We were able to change the magnetic field strength by moving the magnet and moving the circuit across it also. The change also makes a change in the flux. This induces the current. Since the lab is online, there was no error involved with the process. Information from doing a lab like this can help out in real life, like to put into use with motors.