Exercise 2:1- Prove that the electrostatic pression by surface unit applied to the surface of aconductor in electrostatic equilibrium is equal to P,=where o is the surface2ɛ,charge density.2- In order to create a spherical capacitor, a sphere S1 with centerO and radius R = 10 cm is inserted into another sphere S2 withthe same center and radius R = 20cm and that have a thinnyshell. The two spheres are placed in vacium and are neutral inthe beginning. If a potential V = 10*V is applied to the sphere S1%3Dbut the second sphere is isolated, proove that the charge of theR2sphere S1 and the external charge of the sphere S2 are equal to:Q1 =Q2 = 1.1 µC .

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[Numbers change] In the early 1900's Robert Millikan discovered the peculiar property that charge came in little packets, no smaller than e = 1.602 x 10-19 C -- he had measured the charge of the electron. Here's (roughly) how he did it. He removed an electron from an initially neutral droplet of oil with diameter 0.8 um. In a vacuum, he positioned the droplet between two metallic plates separated by 4 mm and fiddled with the potential (voltage) across the plates until the droplet would hover against the force of gravity. Droplets of this size with +e charge would hover, but only for a particular voltage (otherwise they would sink or rise). Given the parameters stated here, and the fact that the density of the oil was 815 kg/m³, what was the voltage that made the droplets hover? (give your answer with 0.1 V precision)
Ra1 +9 -9 Rea Consider two concentric spherical conductors, separated by an isolating material with (absolute) permittivity e. The two conductors have radius R1 and R2, they are put on a potential V and V2, which leads to a charge +q and –q sitting on them, respectively. By the problem's spherical symmetry, we see that the charge on each conductor is distributed uniformly, and that, in spherical coordinates, the electric field between the two conductors is of the form E(r) = -E(r) er. Determine the capacity C using the following steps: 1. Use Gauss's Law in integral form, with N a ball of radius r (R2 < r < R1), to find an expression for E(r) in terms of q. 2. Calculate AV = Vị – V2 using the formula - E•dr Δν and with C the black line segment indicated on the drawing (parallel with e,). 3. The capacity now follows from C = q/AV.
I do not know how to solve the attached phyiscs question.
Any net charge on a conductor resides on its surface even if the the conductor is NOT in electrostatic equilibrium. O True O False
A very long insulating cylindrical shell of radius 6.70 cm cames charge of linear density 8.70 μC/m spread uniformly over its outer surface. You may want to review (Pages 765-769) For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of An infinite line charge or charged conducting cylinder What would a voltmeter read if it were connected between the surface of the cylinder and a point 4.80 cm above the surface? 195] ΑΣΦ AV= Submit Request Answer Part B AV- What would a voltmeter read if it were connected between the surface and a point 1.00 cm from the central axis of the cylinder? 1Η ΑΣΦΑ Submit ? Request Answer V ? V
An insulating sphere of radius R = 3 cm has positive charge uniformly distributed throughout its entire volume. The electric field at the surface of the sphere has a magnitude of E = 5x107 V/m (a) [3 points] Calculate the volumetric charge density p of the sphere (in C/m3) and Calculate the magnitude of the electric field at a point located atr= 1cm, inside the insulator.
In the early 1900's Robert Millikan discovered the peculiar property that charge came in little packets, no smaller than e = 1.602 x 10-19 C -- he had measured the charge of the electron. Here's (roughly) how he did it. He removed an electron from an initially neutral droplet of oil with diameter 0.5 ??μm. In a vacuum, he positioned the droplet between two metallic plates separated by 6 mm and fiddled with the potential (voltage) across the plates until the droplet would hover against the force of gravity. Droplets of this size with +e charge would hover, but only for a particular voltage (otherwise they would sink or rise). Given the parameters stated here, and the fact that the density of the oil was 831 kg/m3, what was the voltage that made the droplets hover? (give your answer with 0.1 V precision)

Exercise 2: 1- Prove that the electrostatic pression by surface unit applied to the surface of a conductor in electrostatic equilibrium is equal to P,= where o is the surface 28, charge density.