Within the green dashed circle shown in the figure below, the magnetic field changes with time according to the expression B = 9.00t3 – 1.00t2 + 0.800, where B is in teslas, t is in seconds, and R = 2.60 cm. x x x x x x x x P x x x x 7x x x x x x x x x x * x x x X x x X x x x x Bin (a) When t = 2.00 s, calculate the magnitude of the force exerted on an electron located at point P,, which is at a distance r, = 5.20 cm from the center of the circular field region. N (b) When t = 2.00 s, calculate the direction of the force exerted on an electron located at point P,, which is at a distance r, = 5.20 cm from the center of the circular field region. O tangent to the electric field line passing through point P, and clockwise O tangent to the electric field line passing through point P, and counterclockwise O The magnitude is zero. (c) At what instant is this force equal to zero? (Consider the time after t = 0 s.)

Within the green dashed circle shown in the figure below, the magnetic field changes with time according to the expression B = 9.00t3 – 1.00t2 + 0.800, where B is in teslas, t is in seconds, and R = 2.60 cm. x x x x x x x x P x x x x 7x x x x x x x x x x * x x x X x x X x x x x Bin (a) When t = 2.00 s, calculate the magnitude of the force exerted on an electron located at point P,, which is at a distance r, = 5.20 cm from the center of the circular field region. N (b) When t = 2.00 s, calculate the direction of the force exerted on an electron located at point P,, which is at a distance r, = 5.20 cm from the center of the circular field region. O tangent to the electric field line passing through point P, and clockwise O tangent to the electric field line passing through point P, and counterclockwise O The magnitude is zero. (c) At what instant is this force equal to zero? (Consider the time after t = 0 s.)