A Cylindrical Region of Radius R Contains a Uniform Magnetic

question 87

Multiple Choice

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)0
• B)2R dB/dt
• C)R dB/dt
• D)(R/2)dB/dt
• E)(R/4)dB/dt

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