At the equator, the earth’s field is essentially horizontal;near the north pole, it is nearly vertical. In between, the anglevaries. As you move farther north, the dip angle, the angle of theearth’s field below horizontal, steadily increases. Green turtlesseem to use this dip angle to determine their latitude. Suppose youare a researcher wanting to test this idea. You have gathered greenturtle hatchlings from a beach where the magnetic field strength is50 μT and the dip angle is 56∘. You then put the turtlesin a 2.0 m diameter circular tank and monitor the direction inwhich they swim as you vary the magnetic field in the tank. Youchange the field by passing a current through a 100-turn horizontalcoil wrapped around the tank. This creates a field that adds tothat of the earth.
A.) In what direction should current pass through the coil, toproduce a net field in the center of the tank that has a dip angleof 62∘ ? [ANSWER: CLOCKWISE]
B.) What current should you pass through the coil, to produce a netfield in the center of the tank that has a dip angle of 62∘ ?
Please show step-by-step solution. Thank you!
