(Solved): Within the green dashed circle shown in the figure below, the magnetic field changes with time acco ...

Within the green dashed circle shown in the figure below, the magnetic field changes with time according to the expression $$B=5.00t^3?1.00t^2+0.800$$, where $$B$$ is in tesias, $$t$$ is in seconds, and $$R=2.25\mathrm{cm}$$. (a) When $$t=2.00\mathrm{s}$$, calculate the magnitude of the force exerted on an electron located at point $$P_1$$, which is at a distance $$r_1=4.50$$ cm from the center of the circular field region. $$\mathrm{N}$$ (b) When $$t=2.00\mathrm{s}$$, calculate the direction of the force exerted on an electron located at point $$P_1$$, which is at a distance $$r_1=4.50\mathrm{cm}$$ from the center of the circular field region. tangent to the electric field line passing through point $$P_1$$ and clockwise tangent to the electric field line passing through point $$P_1$$ and counterclockwise The magnitude is zero. (c) At what instant is this force equal to zero? (Consider the time after $$t=0$$ s.) ) The induced electric field is determined by the rate of change of the magnetic flux. $$s$$