HW9c - GenericStudent – Homework 9 – savrasov – 39823...

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Unformatted text preview: GenericStudent – Homework 9 – savrasov – 39823 – Jan 02, 2008 1 This print-out should have 12 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. 001 (part 1 of 1) 1 points A coil of 93 . 8 turns in the shape of a rectangle with width 5 cm and length 10 cm is dropped from a position where magnetic field is 0 T to a position where the field is 0 . 5 T and is directed perpendicular to the plane of the coil. The displacement occurs in a time of 0 . 501 s. Calculate the resulting average emf induced in the coil Correct answer: 0 . 468064 V. Explanation: Basic Concepts: Faraday’s Law of Induc- tion: E =- d Φ B dt According to Faraday’s Law of induction, we may work this problem out straight- forwardly: |E| = n · d Φ B dt = n · ΔΦ B Δ t = n · Δ B · A Δ t = 0 . 468064 V keywords: 002 (part 1 of 2) 1 points A loop of area 0 . 16 m 2 is rotating at 52 rev / s with the axis of rotation perpendicular to a . 08 T magnetic field. If there are 893 turns on the loop, what is the maximum voltage induced in it? Correct answer: 3734 . 6 V. Explanation: Let : A = 0 . 16 m 2 , f = 52 rev / s , B = 0 . 08 T , and N = 893 turns . Basic Concept: Faraday’s Law for Solenoid E =- N d Φ B dt φ B = B A cos θ θ = ω t E = N AB ω sin( ω t ) ....
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HW9c - GenericStudent – Homework 9 – savrasov – 39823...

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