A circular parallel-plate capacitor whose plates have a radius of 25 cm is being charged with a current of 1.3 A.What is the magnetic field 11 cm from the center of the plates?

Question

Quizplus · Accepted Answer

The magnetic field at a distance r from the center of a circular current loop is given by:$$B = \frac{\mu_0 I}{2\pi r}$$where:* B is the magnetic field in teslas (T)* μ0 is the permeability of free space (4π × 10^-7 T·m/A)* I is the current in amperes (A)* r is the distance from the center of the loop in meters (m)In this problem, we have:* I = 1.3 A* r = 11 cm = 0.11 mPlugging these values into the equation, we get:$$B = \frac{(4\pi 	imes 10^{-7} 	ext{ T}\cdot	ext{m/A})(1.3 	ext{ A})}{2\pi (0.11 	ext{ m})}$$$$B = 4.6 	imes 10^{-7} 	ext{ T}$$Therefore, the correct answer is A.

A Circular Parallel-Plate Capacitor Whose Plates Have a Radius of 25