## Suppose that a parallel-plate capacitor has circular plates with radius R = 70.0 mm and a plate separation

Question

Suppose that a parallel-plate capacitor has circular plates with radius R = 70.0 mm and a plate separation of 4.1 mm. Suppose also that a sinusoidal potential difference with a maximum value of 400 V and a frequency of 120 Hz is applied across the plates; that is V = (400 V) sin [2 ? (120 Hz) t ]. Also find B for r = 35mm, 140mm and 210 mm

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