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23 Nov 2019
A circular metal ring, as shown on the diagram below, isconstructedso as to expand or contract freely. In a region with aconstantmagnetic field Bo oriented perpendicularto it, the ringexpands, with its radius growing with timeasr=ro(1+αt2).Asthe ring expands and grows thinner, its resistance per unitlengthchanges accordingtoR=Ro(1+βt2).Findthe current induced in the ring as a function of time. Tocheck youranswer, suppose that Bo =3.00 mT, ro= 10.0 cm,Ro = 8.00 [ Ω/(m)], α =0.110à 10-4sâ2,and β = 0.585Ã10-2sâ2. What isthe value of theinduced current at t = 74.5 s?(Note: Give the direction ofthe current where when viewed fromabove a positive current willmove counterclockwise.)
http://nplq1.phyast.pitt.edu/res/fsu/capalibrary/65EMInductionFaradayLenz/Graphics/prob05.gif
A circular metal ring, as shown on the diagram below, isconstructedso as to expand or contract freely. In a region with aconstantmagnetic field Bo oriented perpendicularto it, the ringexpands, with its radius growing with timeasr=ro(1+αt2).Asthe ring expands and grows thinner, its resistance per unitlengthchanges accordingtoR=Ro(1+βt2).Findthe current induced in the ring as a function of time. Tocheck youranswer, suppose that Bo =3.00 mT, ro= 10.0 cm,Ro = 8.00 [ Ω/(m)], α =0.110à 10-4sâ2,and β = 0.585Ã10-2sâ2. What isthe value of theinduced current at t = 74.5 s?(Note: Give the direction ofthe current where when viewed fromabove a positive current willmove counterclockwise.)
http://nplq1.phyast.pitt.edu/res/fsu/capalibrary/65EMInductionFaradayLenz/Graphics/prob05.gif
Jean KeelingLv2
12 Apr 2019