Question: For the situation shown in Figure P31.32, the magnetic field changes with time according to the expression B = (2.00t 3 - 4.00t 2 +

For the situation shown in Figure P31.32, the magnetic field changes with time according to the expression B = (2.00t 3 - 4.00t 2 + 0.800)T, and r2 = 2R = 5.00 cm.
(a) Calculate the magnitude and direction of the force exerted on an electron located at point P2 when t = 2.00 s.
(b) At what time is this force equal to zero?

For the situation shown in Figure P31.32

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