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I attached a problem from a practice exam. I'm stuck on part b). Part A, I'm assuming the answer is the standard equation for an infinite current sheet.

How do I find induced current? I can only think of using Emf = NBA*ωsintωt

Where Emf= I/R, but I don't have resistance.

Only other equation I know is K= ρ*ω*r , where ρ is surface charge density, but don't got that either.

Any help on the first step?

EDIT: Thinking now there might have been a table of resistivity for the copper. Then R can be found easily.

How do I find induced current? I can only think of using Emf = NBA*ωsintωt

Where Emf= I/R, but I don't have resistance.

Only other equation I know is K= ρ*ω*r , where ρ is surface charge density, but don't got that either.

Any help on the first step?

EDIT: Thinking now there might have been a table of resistivity for the copper. Then R can be found easily.

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