When current is induced in a conducting loop by the motion of a nearby magnet, the induced magnetic field \(\vec{B}_{\text {ind }}\) exerts a force on the magnet.

(a) In Figure \(29.12 b\), what is the direction of the force exerted on the magnet by \(\vec{B}_{\text {ind }}\) ?

(b) Suppose Lenz's law stated that the induced current adds to the change that produced it instead of opposing it. What would be the direction of the force exerted by \(\vec{B}_{\text {ind }}\) on the magnet?

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Figure 29.12 (a) (b) N S N S (c) N S