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Q2 (9 marks) A dc potential difference V across a conducting solid wire of radius a and length L sets a uniform electric current

Q2 (9 marks) A dc potential difference V across a conducting solid wire of radius a and length L sets a uniform electric current I to flow down the wire in the positive z-direction (+2). Use ONLY the cylindrical coordinates with unit vectors (s. 4, z). A) What is the surface electric field E associated with this current? B) Find the magnetic field B at the wire surface.

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