Question: (a) In Fig. 20.10, what would happen to the direction of the induced current if the metal rod were moving down-ward instead? (b) What would

(a) In Fig. 20.10, what would happen to the direction of the induced current if the metal rod were moving down-ward instead?
(b) What would happen to the direction of the induced magnetic field? Is the induced magnetic field necessarily opposite to the external field direction?

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