Constants & Formula Sheet Charge of an Electron- 1.6 x 101 C & Charge of a Proto

Question

Constants & Formula Sheet Charge of an Electron- 1.6 x 101 C & Charge of a Proton 1.6x 1019 c Coulomb's Constant899x10 N m/c Permittivity of free space for electricity-C.-8.85x 10" /(Nm') Permittivity of free space fir magnetisan /,-4n10-, T-m/A V=IR I, N , N = NIA B sin 2 R 1-2 2) A rectangular single loop created by a conducting rail and conducting rod is in a constant magnetic field of 0.7ST directed into the page. Initially the conducting rod is at position x 10 m, the rod was finally pulled to positionx 0 m. It takes a time of 0.2 s to pull the rod to the new position. IfL-4 m find a) The magnitude of the initial magnetic flux in the koop? b) The magnitude of the average induced emf in it during this time interval? (20 pts) Conducting r Conducting rod

Explanation / Answer

a) Magnetic flux in the loop = BA
B is magnetic filed normal to the area of loop, and A is area of loop
Initial magnetic flux in the loop = 0.75(10*4)
                                                   = 30 Wb

b) Average induced emf = change in flux / time
    As conductor reaches left end of loop, area =0
Hence flux in the loop =0
change in flux = initial flux = 30 wb
Average induced emf = 30/0.2
   = 150 V                               

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