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Phys 313 Quiz 22

Question 1

A long straight wire carries a current into the board. Point P lies nearly above the wire. Which direction is the magnetic field at point P?

   Answer:  to the right

Question 2

A long straight wire carries a current I into the board. There are two circles drawn on the board, both centered on the wire. One has a large radius, the other a small radius.

The integral

             B dot ds
around the little circle is
   Answer:    b), the same (because both circle surround the same
	                 amount of current)

Question 3

What is the value of the integral

            B dot ds
around the little circle in problem 2?

   Answer:  mu-nought times I

Creative Commons License Copyright © Michael Richmond. This work is licensed under a Creative Commons License.