Assignment II Instructions

• There are three tasks you need to complete for this assignment, both on the provided PowerPoint.

Task 1

• The first task is to understand the direction the magnetic field is pointing in a solenoid based on the direction the current is flowing in the coils.
• The diagram on slide 1 is the side view of the solenoid with the current flowing UP on the side we are facing.
• Using the Right-Hand Rule, placing your right thumb in the direction of the current, and wrapping your fingers around a single coil, you will be able to tell the direction the field is pointing through the solenoid. If not, reach out to me and we can discuss this together!
• Once you determine the direction the magnetic field is pointing, you need to indicate this to me by telling me how the magnetic field is flowing through each cross-sectional area on the solenoid.
  • Looking at the left side cross-sectional area head-on, is the magnetic field flowing towards you ("out of the page") or away from you ("into the page"). And vice versa for the right side, is the magnetic field flowing away from you ("out of the page") or away from you ("into the page").
  • Indicate this using the x's and dots on the PowerPoint slide placing the correct one in each circle.

Task 2

• Connect the power supply and the ammeter to the solenoid. Use the knowledge that you used in circuits experiment.
• Next place the probe inside the solenoid? (Note: What is the best place to place the probe? Centre of the solenoid or to the side? or outside?)
• Use the V and R values given to calculate I
• Use that I value and other values given to predict the reading in the tesla meter (the strength of the magnetic field)

Task 3

• Task 3 is a bit more time intensive. The goal of this task is to practice your knowledge of Faraday's and Lenz's Laws. As we saw from assignment I, moving charges create magnetic fields. However, the inverse is also true! A changing magnetic field will create an induced voltage (also referred to as EMF) generating a current in a circular loop of wire the magnetic field is flowing through. This is exactly Faraday's Law!