Electric Field using Ampere's law

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To find the magnitude of the magnetic field at point P, 15.0 cm from the center of the circular area, Ampere's law can be applied, taking into account the changing electric field. The upward direction of the magnetic field is confirmed due to the right-hand rule, as the electric field is increasing outward. The rate of change of the electric field, 22.0 V/m·s, contributes to the induced magnetic field. The calculation involves using the relationship between the electric field and the magnetic field in a changing field scenario. Ultimately, applying Ampere's law will yield the required magnitude of the magnetic field at point P.
Limabeane14
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Consider the situation shown in Figure P24.1. An electric field of 300 V/m is confined to a circular area d = 11.0 cm in diameter and directed outward perpendicular to the plane of the figure. If the field is increasing at a rate of 22.0 V/m·s, what are direction and magnitude of the magnetic field at the point P, 15.0 cm from the center of the circle?


I know that the direction is upward but how do I find the magnitude?

Thanks.
 
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You need to use Ampere's law, but judging by the simplicity of the problem, i am not sure if you have learned that topic yet.
 

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