Hammerhead sharks are known to be able to detect magnetic fields. Acertain marine biologist wraps 200 turns of wire around a 10 m diameter cylindrical shark tank. She then passes a current of 2 A through the wire.
a. What is the magnetic field strength at the center of the tankdue to the current in the coil?
b. What is the ratio of the field due to the current to theearth's magnetic field?
c. If the shark's head is 1 m wide and it can swim up tospeeds of 30 kmph, what is the maximum potential difference that can be generated between the two extremities of its head?