TA: Tomoyuki NakayamaFriday, July 2, 2010PHY 2048: Physic 2, Discussion Section 8704 Quiz 5 (Homework Sets #8 & #9) Name: UFID: Formula sheets are not allowed. Calculators are allowed. Do not store equations in your calculator. You need to show all of your work for full credit. ________________________________________________________________________________ In the figure below right, a long straight wire carries a current i1= 80.0 A and a square loop carries current i2= 50.0 A. Take a= 5.00 cm and L= 20.0 cm. a) What are the magnitude and direction of the force exerted on the top edge of the loop? What are the magnitude and direction of the force exerted on the bottom edge? (To show the directions of the forces, draw arrows in the figure.) The strength of the magnetic field due to a long straight wire depends on the perpendicular distance r from the wire and it is given by B = μ0i/(2πr). Therefore, the fields at the top and bottom edges are, respectively BT= μ0i1/(2πa), BB= μ0i1/(2π(a+L)) The right-hand rule tells you that the direction of the field below the straight wire is out of the paper. (Point your thumb in
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Magnetic Field, TA, 20.0 cm, straight wire, 5.00 cm, Tomoyuki Nakayama