Download Problem Set 6

Homework Problem Set 6
Homework due by 5:00 pm on Thursday March 22.
Partial credit may be given even if the final answer is incorrect so please show all work!
Question 1 (1 point)
What is Ampere’s Law? How is it similar to Gauss’ Law for electric fields? How is it different?
Question 2 (3 points)
A strip of copper 2.5 mm wide and 1.2 mm thick is used as a conductor. It is placed in a
magnetic field of 0.45 T and a current of 30 mA is run through it. What is the magnitude of the
Hall voltage? If the current runs to the east, and the magnetic field points north, which side of the
strip will have the higher voltage? The molar mass and density of copper are given in example
29.7 of your book.
Question 3 (3 points)
A wire of length 24 cm is bent into a square and placed flat on a table. A current of 45 mA is
passed through the wire in a counter-clockwise direction (looking from above). What is the
magnitude and direction of the resulting magnetic field at the center of the square?
Question 4 (3 points)
Two squares of wire like that in the previous question are placed side by side on a table with a
distance of 8 cm between the closest sides of the two squares. A 45 mA current passes counterclockwise through both squares. What is the resulting force between the two squares? Is it
attractive or repulsive?