Solutiontest4

Solutiontest4 - FINAL EXAM Physics 108 Fall 2003 Print your...

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2 Print our name: ____________________________ P1. A rectangular wire loop (dimensions: h = 12.0 cm, w = 15.0 cm) is placed in a uniform magnetic field B as shown in fig.a. The magnetic field B changes with time t as shown in fig.b. The resistance R of the loop is 0.5 a. (6) Determine the induced emf E on the loop for 0 < t < 0.1 s b. (6) Determine the induced emf E ' on the loop for 0.1 s < t < 0.2 s c. (2) Calulate the induced current I during the time interval 0 < t < 0.1 s d. (6) Use Lenz’s rule to determine the direction of the induced current during the time interval 0 < t < 0.1 s e. (5) Determine the total charge Q that flows through a cross section of the loop wire during the time interval 0 < t < 0.2 s C 10 4 . 5 1 . 0 0 1 . 0 10 4 . 5 It Q (e) flux magnetic the reduce to tends thus and B of direction opposite in the is B field magnetic induced that the so fig.a) (see direction (CW) clockwise in the flow must current induced The increases. flux magnetic the (a) part From ) ( 10 4 . 5 5 . 0 10 7 . 2 R I ) ( 0 0 ) 15 . 0 ( ) 12 . 0 ( dt d ) ( 10 7 . 2 1 . 0 0 15 . 0 ) 15 . 0 ( ) 12 . 0 ( dt d dt d ) ( 3 2 ind 2 2 2 × = × + × × = = Φ × = × = = = × × = = × = × = = Φ = = Φ d A c B hw b V B hw Bhw a E E E E Place your answers here. (a) E = V 2 10 7 . 2 × (6) (b) E = 0 (6) (c) I = A 2 10 4 . 5 × (3) (d) Direction of I: Circle one: CW CCW (6) ( e ) Q = C 10 4 . 5 3 × (5) B 0.15 T O 0.1 s 0.2 s t Fig.b h w B Fig.a X .
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This test prep was uploaded on 04/14/2008 for the course PHYSICS 108 taught by Professor Halstead during the Spring '08 term at SUNY Buffalo.

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Solutiontest4 - FINAL EXAM Physics 108 Fall 2003 Print your...

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