A parallel-plate capacitor consists of two plates, each with an area of 29 cm2 separated by 3.0 mm. The charge on the capacitor is 9.3 nC. A proton is released from rest next to the positive plate. How long does it take for the proton to reach the negative plate?

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.