A Parallel-Plate Capacitor , Made of Two Circular Plates of Radius

question 48

Multiple Choice

A parallel-plate capacitor , made of two circular plates of radius R = 10 cm, is being charged. What is the magnitude of the induced magnetic field induced by the displacement current between the plates of the capacitor at a distance r = 2 cm from the axis of the plates at a time when the electric field varies at the rate dE/dt = 2 × 10¹² V/m s?

• A)0.7 × 10^-7 T
• B)2.2 × 10^-7 T
• C)8.1 × 10^-7 T
• D)3.5 × 10^-7 T
• E)1.3 × 10^-7 T

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