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Problem 3: Put yourself inside a parallel-plate capacitor with plate radius a and plate separation h < a. Now imagine that there is current I going in to the capacitor, so it is charging, with the top plate having positive charge 2 > 0 and I magnetic fields at or near the edge of the capacitor (at r~ a)? Which way Hoes the Poynting vector point? Now consider the case of negative current, such that Q> 0 and dQ/dt < 1. Which way does the Poynting vector point? Now consider the two cases of negative charge, so consider Q <0 and Q/dt > 0 and Q<0 and dQ/dt < 0. Summarize your answers in a chart: dQ/dt 0. What are the directions of the electric and

Problem 3: Put yourself inside a parallel-plate capacitor with plate radius a and plate separation h < a. Now imagine that there is current I going in to the capacitor, so it is charging, with the top plate having positive charge 2 > 0 and I magnetic fields at or near the edge of the capacitor (at r~ a)? Which way Hoes the Poynting vector point? Now consider the case of negative current, such that Q> 0 and dQ/dt < 1. Which way does the Poynting vector point? Now consider the two cases of negative charge, so consider Q <0 and Q/dt > 0 and Q<0 and dQ/dt < 0. Summarize your answers in a chart: dQ/dt 0. What are the directions of the electric and

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2 / 2 100% Problem 3: Put yourself inside a parallel-plate capacitor with plate radius a and plate separation h < a. Now imagine that there is current I going in to the capacitor, so it is charging, with the top plate having positive charge Q > 0 and I : magnetic fields at or near the edge of the capacitor (at r ~ a)? Which way does the Poynting vector point? Now consider the case of negative current, such that Q>0 and dQ/dt < 0. Which way does the Poynting vector point? Now consider the two cases of negative charge, so consider Q < 0 and dQ/dt > 0 and Q<0 and dQ/dt < 0. Summarize your answers in a chart: What is the direction of the Poynting vector for every choice of the sign of Q and the sign of dQ/dt? dQ/dt > 0. What are the directions of the electric and
Transcribed Image Text:2 / 2 100% Problem 3: Put yourself inside a parallel-plate capacitor with plate radius a and plate separation h < a. Now imagine that there is current I going in to the capacitor, so it is charging, with the top plate having positive charge Q > 0 and I : magnetic fields at or near the edge of the capacitor (at r ~ a)? Which way does the Poynting vector point? Now consider the case of negative current, such that Q>0 and dQ/dt < 0. Which way does the Poynting vector point? Now consider the two cases of negative charge, so consider Q < 0 and dQ/dt > 0 and Q<0 and dQ/dt < 0. Summarize your answers in a chart: What is the direction of the Poynting vector for every choice of the sign of Q and the sign of dQ/dt? dQ/dt > 0. What are the directions of the electric and
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