Magnitude of the electric field created by changing magnetic field at radial distance r = 0.20 m from the magnetic field center?

A uniform magnetic field pointing in the positive z direction fills a cylindrical volume of space of radius R whose central axis is the z axis. Outside this region, there is no magnetic field. In (Figure 1) R = 0.27 m and the magnetic field magnitude is decreasing at a rate of 0.30 T/s . What is the magnitude of... show more A uniform magnetic field pointing in the positive z direction fills a cylindrical volume of space of radius R whose central axis is the z axis. Outside this region, there is no magnetic field. In (Figure 1) R = 0.27 m and the magnetic field magnitude is decreasing at a rate of 0.30 T/s . What is the magnitude of the electric field created by this changing magnetic field at radial distance r = 0.20 m from the magnetic field center?
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