Determining Dot Markings ECE 201 Circuit Theory I

Arbitrarily Select One Terminal Mark with a dot ECE 201 Circuit Theory I

Assign a Current to the Terminal ECE 201 Circuit Theory I

Apply the Right-Hand Rule Determine the direction of magnetic field established by the current ECE 201 Circuit Theory I

Pick one terminal of the second coil Assign a current into this terminal ECE 201 Circuit Theory I

Apply the Right-Hand Rule Determine the direction of magnetic flux established by this current. ECE 201 Circuit Theory I

Compare the directions of the fluxes If the fluxes have the same direction, place a dot at the terminal where the test current enters. If the fluxes have different directions, place a dot on the terminal where the test current leaves. ECE 201 Circuit Theory I

Summary ECE 201 Circuit Theory I

Let’s Try Some Examples ECE 201 Circuit Theory I

ECE 201 Circuit Theory I

ECE 201 Circuit Theory I

ECE 201 Circuit Theory I

ECE 201 Circuit Theory I