In this image, I understand
a) As the loop moves closer to the current the field increases. So therefore the current must go in the opposite direction, thus counter clockwise.
b) the loop moves farther away, the field decreases, so the current moves clockwise around the loop.
c) the field doesn't change, so there is no current change.
d) the current increases, which increases the field, and that has to be negated, so counter clockwise.
Those are the correct answers.
However, when looking at another example, I am having some troubles.
With this I understand b) and c).
b) The current is constant, no change.
c) Again, there current is constant, and the loop is not moving in a way to change the field.
But for a) and d). I don't understand.
- a) is clockwise, so this is acting a decrease.
- d) is counter clockwise, so this is acting as an increase.
But I don't understand how the sinusoidal are interacting differently. Can someone please explain how the sin and cos functions act on the loop?