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

question 5

Multiple Choice

A parallel-plate capacitor, made of two circular plates of radius R = 10 cm, is connected in series with a resistor of resistance R = 100 Ω and a battery of emf E = 10 V. What is the maximum value of the magnetic field induced by the displacement current between the plates, at a distance r = 5 cm from the axis of the plates while the capacitor is being charged?

• A)3 × 10^-7 T
• B)5 × 10^-7 T
• C)2 × 10^-7 T
• D)1 × 10^-7 T
• E)4 × 10^-7 T

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