We looked at induced currents, loops, magnetic fields.

Spent some time on the right hand rule.

Also looked at the difference between dot products and cross products. They are important for the current material.

The result of a dot product is a scalar, the result of a cross product is a vector.

One has the sine function in it and the other has a cosine.

So if you took the dot product of two perpendicular vectors, you would get zero.

If you took the cross product of two parallel vectors, you would get zero.

Good not to mix them up. Neither one of them is simply ‘multiplication’, though sometimes they reduce to that depending on the scenario. The cross product will still have a direction in addition to a simple multiplication even with orthogonal vectors.

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