lecture12

Fundamentals of Physics, (Chapters 21- 44) (Volume 2)

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Unformatted text preview: apter 29: Magnetic Fields due to Curren Solenoids Getting vector B of a Solenoid Toroids Torque in an Electric Field Torque in an Magnetic Field A Current Carrying Coil Checkpoint #4 Problems Faraday’s Law Chapter 29: Magnetic Fields due to Currents – p. Solenoids A solenoid is a conducting wire wrapped into a cylindrical shape. It acts like a capacitor for magnetic fields. Inside: vector B is constant Outside: vector B is virtually zero Chapter 29: Magnetic Fields due to Currents – p. Getting vector B of a Solenoid To find vector B , we use Ampere’s Law and treat the solenoid like two lines of current-carrying wires. In the middle, vector B = μ in where i is the current going through the solenoid, and n is the number of turns in the solenoid. Chapter 29: Magnetic Fields due to Currents – p. Toroids A toroid is a solenoid that has been curved until its ends meet (a current doughnut). vector B is trapped within the toroid....
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Lecture12 - apter 29 Magnetic Fields due to Curren Solenoids Getting vector B of a Solenoid Toroids Torque in an Electric Field Torque in an

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