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Unformatted text preview: 1 Quiz 4 key 1. A long, straight wire carries current I = 10 A. A right-angle bend is made in the middle of the wire. The bend forms an arc of a circle of radius r = 50 cm. Determine the magnetic filed at the center of the arc (both magnitude and direction). 2. A loop of wire in the shape of a rectangle has resistance of 10 ohm. A long and straight wire carrying a current I lies on tabletop as shown in the figure. (a) Determine the magnetic flux through the loop due to the current I . (b) Suppose the current is changing with time according to I = I max sin(50 t ). Determine the emf that is induced in the loop if I max = 10.0 A, h = 2.00 cm, w = 1.0 cm and L = 50 cm. What is the induced current and it direction in the loop? What is the power transferred from the original current to the loop? ( ) 7 7 6 90 4 10 10 4 10 10 1 7.1 10 2 2 360 2 0.5 2 0.5 4 center line arc I I B B B T r r --- = + = + = + =...
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