# act09 - 3 At t = 2 s find the flux of magnetic field...

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Do NOT write on these sheets or take them with you…. The Next class needs them too! PHYS-1200 PHYSICS II SPRING 2005 Class 9 Activity: Faraday’s Law and Inductance We initially wrote Faraday's Law to describe an induced emf as: dt d B Φ - = E In the "new" formulation, we generally state Faraday's Law as Φ - = dt d s d E B 1. State in your own words what this new formulation of Faraday’s law means. 2. A long solenoid has 200 turns per centimeter and a radius of 15 cm. It carries a current that varies according to the equation i sol = 4 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.
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Unformatted text preview: 3. At t = 2 s, find the flux of magnetic field through a circle of radius 7.0 cm, centered on the axis of the solenoid. 4. At t = 2 s, find the rate of change of flux through a circle of radius 7.0 cm, centered on the axis of the solenoid. 5. At t = 2 s, find the strength of the electric field induced along a circle of radius 7.0 cm, centered on the axis of the solenoid. 6. At t = 2 s, find the strength of the electric field induced along a circle of radius 20.0 cm, centered on the axis of the solenoid. 7. At t = 2 s, find the magnetic energy density in the solenoid....
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