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OL PH 223 26:5-7

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Richard Datwyler

on 18 February 2016

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Transcript of OL PH 223 26:5-7

Air breaks down when the electric field strength reaches 3.0 X 10^6 N/C, causing a spark. A parallel-plate capacitor is made from two 4 x 4 cm plates. How many electrons must be transferred from one disk to the other to create a spark between the disks.
The surface charge density of an infinite charged plane is -2.0 X 10^6 C/m^2. A proton is shot straight away from the plane at 2.0 X 10^6 m/s. How far does the proton travel before reaching its turning point?
In a classical model of the hydrogen atom, the electron orbits a stationary proton in a circular orbit. What is the radius of the orbit for which the orbital frequency is 1.0 X 10^12 Hz?
An infinitely long sheet of charge of width L lies in the xy-plane between x=−L/2 and x=L/2. The surface charge density is η. Derive an expression for the electric field E along the x-axis for points outside the sheet (x>L/2) for x>0.
Electric fields and Dynamics in a Capacitor
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