A 12-M Radius Cylindrical Region Contains a Uniform Electric Field Along

question 38

Multiple Choice

A 1.2-m radius cylindrical region contains a uniform electric field along the cylinder axis. It is increasing uniformly with time. To obtain a total displacement current of 2.0*10 ^{- 9} A through a cross section of the region, the magnitude of the electric field should change at a rate of:

• A) 5.0 V/m .s
• B) 12 V/m .s
• C) 37 V/m .s
• D) 50 V/m .s
• E) 4.0* 10⁷ V/m .s

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