1. An electron at point A in the figure has a speed v₁ = VO A B K -10.0 cm- 1.41 × 106 m/s. (a) Find the magnitude and direction of the magnetic field that will cause the electron to follow the semicircular path from point A to point B in the figure. (b) Find the time required for the electron to move from A to B. 2. The circuit in the figure below is located in a magnetic field whose magnitude varies with time according to the expression B = 1.00 × 10-³t, where B is in teslas and t is in seconds. Assume the resistance per length of the wire is 0.105 N/m. (a) Find the current in section PQ of length a = 58.0 cm. (b) What is the direction of the magnetic force on the section PQ? a ******** x * * **** Bin Pin ***** ******** 2a P 0 **** ** **** **** a 2