Help for physics assignment?
Hello, I took a physics exam today and was asked in which coil a voltage is induced. See attachment.
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Should the thick arrow not mean anything other than the “direction of the magnetic field”? Perhaps the direction of movement when moving the coil in the magnetic field or moving it out of it?
If it is to really mean the direction of the magnetic field, it is superfluous, because it is seen by the thin arrows, and moreover the drawing b) contradicts itself.
That’s exactly how it was depicted. I couldn’t get out of the arrows.
Okay. Let’s assume that the big thick arrow means what’s going on and serves *not* as I first thought to explain the small thick arrows at a) and b).
However, if we continue to assume that no thick arrows at a) and b) mean the direction of movement when the coil is moved in the magnetic field or it moves out of it.
Then this is my answer to the question put:
At b), voltage is induced as soon as the coil reaches the edge of the magnetic field during its movement and the magnetic flux passing through the coil begins to decrease. The voltage is induced until the magnetic flux has reached zero through the coil and then remains the same.
At d), an alternating voltage is induced because the coils at the alternating current source generate a magnetic alternating field which alternately increases and decreases.
Thank you for the answer. If the big arrows show the movement of the coil, how about it?