Two long straight wires carrying conventional current I are connected by a three-quarter-circular arc of radius R. (The rest of the circuit is far enough away that it contributes little magnetic field in this region.)

A proton of a circuit -the rest of the circuit is far away and has little effect.

Electric fields are also present in this region, due to charges not shown on the drawing. An electron is moving to the right with speed v as it passes through the center C of the arc and at that instant the net electric and magnetic force on the electron id zero.

(a) what is the direction of the magnetic field at the center C, due to the current I?

(b) what is the direction of the electric field at the center C?

(c) what is the magnitude of the magnetic field at the center C, due to the current I?

(d) what is the magnitude of the electric field at the centerC? ? ? ? ??

Radius R C. V Electron 11 1