Question

A coil lies flat on a level table top in a region where the magnetic field vector points straight up. The magnetic field suddenly disappears. When viewed from above, what is the direction of the induced current in the coil as the field disappears?

a) clockwise
b) counterclockwise
c) clockwise initially, then counterclockwise before stopping
d) there is no induced current in this coil because the field is gone

Answer 1

a) counterclockwise

Step-by-step explanation:

The Lenz's Law establish that the direction of the induced current is in an opposite direction, in comparison with the change od the magnetic flux.

`\epsilon=-(d\Phi_(B))/(dt)`

Specifically, if the flux decreases the induced current is in a counterclockwise direction, if increases, the direction is in a clockwise direction.

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