A cylindrical region of radius R contains a uniform magnetic field parallel to its axis. The field is zero outside the cylinder. If the magnitude of the field is changing at the rate dB/dt, the electric field induced at a point 2R from the cylinder axis is:
A) zero
B) 2R dB /dt
C) R dB /dt
D) (R/2) dB /dt
E) (R/4) dB /dt

Question

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The Answer of A cylindrical region of radius R contains a uniform magnetic field parallel to its axis. The field is zero outside the cylinder. If the magnitude of the field is changing at the rate dB/dt, the electric field induced at a point 2R from the cylinder axis is:
A) zero
B) 2R dB /dt
C) R dB /dt
D) (R/2) dB /dt
E) (R/4) dB /dt

A Cylindrical Region of Radius R Contains a Uniform Magnetic