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Unformatted text preview: Do NOT write on these sheets or take them with you! The next class needs them too! PHYS-1200 PHYSICS II SPRING 2006 Class 9 Activity: Faradays Law and Inductance SOLUTION Faradays law is generally stated as - = dt d s d E B , although we initially used it as 1. State in your own words what this new formulation of Faradays law means. A changing magnetic field produces an electric field. 2. A long solenoid has 200 turns per centimeter and a of radius 15 cm. It carries a current that varies according to the equation i sol = 3 t + t 2 , where i is in amperes and t is in seconds. Find the strength of the magnetic field in the solenoid as a function of time. T ) 3 )( 10 51 . 2 ( T ) 3 )( 10 8 ( ) 3 )( 20000 )( H/m 10 4 ( ) 3 ( 2 2 2 3 2 7 2 t t B t t t t t t n ni B + = + = + = + = =--- where t is in seconds . 3. At t = 2 s, find the flux through a circle of radius 7.0 cm, centered on the axis of the solenoid....
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