PHYSICS 309L, TEST 2 1) - By what distance must two currents of +330 A each be separated so that the force per unit length between them is 10-2 N/m .- In order for this force per unit length to be repulsive, how should the two currents be ﬂowing? 2) A coil with 250 loops of conducting wire is subject to a magnetic ﬁeld that went from0 T to 1 T in 0 . 1 s .- What is the change of the electric potential induced by the changing magnetic ﬁeld?- In words what can you say about the direction of the current induced in the loops? (hint: the direction of the induced current must be such that. ..) 3)What is the resistance of a 60
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