Question

Constants Suppose you go to Antarctic region (geographic south pole) for an undergraduate research project. Your location is very close to the magnetic pole of the earth. Assume that earth's magnetic field is uniform and has a strength of 60 ut. As a part of the experiment you hold a thin metal rod of length 20 cm and run toward east at a speed of 5 m/s. What direction should you hold the rod steady to get maximum emf in the rod? What is the magnitude of the emf generated? Part A No emf is developed at any position. Horizontal perpendicular to the direction of motion; 60 UV Horizontal parallel to the direction of motion; 100 uV Vertical; 60 uV o Horizontal perpendicular to the direction of motion; 40 uV.

Answer 1

The rod must be kept horizontal, and with its length perpendicular to the direction of motion. The induced me is given as

E = B x L x v = 60 x 0.2 x 5 = 60 $\mu V$

Answer: Horizontal, perpendicular to the direction of motion, $60\ \mu V$