A Parallel-Plate Capacitor Has Closely Spaced Circular Plates of Radius

question 19

Multiple Choice

A parallel-plate capacitor has closely spaced circular plates of radius R = 2.00 cm.Charge is flowing onto the positive plate at the rate I = dQ/dt = 1.36 A.The magnetic field at a distance r = 2.00 cm from the axis of the plates is approximately

• A)136 mT
• B)256 mT
• C)16.5 mT
• D)457 mT
• E)88.3 mT

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