An electron at point A in Fig. E27.15 has a speed v0 of 1.41 × 106 m/s. Find (a) the mag...

An electron at point A in Fig. E27.15 has a speed v0 of 1.41 × 10⁶ m/s. Find (a) the magnitude and direction of the magnetic field that will cause the electron to follow the semicircular path from A to B, and (b) the time required for the electron to move from A to B.