When the current through a circular loop is 7.5 A, the magnetic field at its center is 1 × 10-4 T. What is the radius of the loop?
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- Aircraft sometimes acquire small static charges. Suppose a supersonic jet has a 0.35 μC charge and flies due west at a speed of 640 m/s over the Earth’s south magnetic pole, where the 8.00 × 10-5 T magnetic field points straight up. v = 640 m/sq = 0.35 μC What is the magnitude of the magnetic force on the plane, in newtons?An electron moves in a circular path with a speed of 1.36 x 107 m/s in the presence of a uniform magnetic field with a magnitude of 1.84 mT. The electron's path is perpendicular to the field. (a) What is the radius (in cm) of the circular path? cm (b) How long (in s) does it take the electron to complete one revolution? S Read ItThe figure shows the cross section of a long conducting cylinder with inner radius a= 2cm and outer radius b-4cm. the cylinder carries a current out of the page and the current density in the cross section is given by j=cr^2 with c=3x10^6 A/m^4 and r in meters What is the magnetic field B at a point 3 cm from the central axis of the cylinder?