The potential difference across the capacitor C₂ in the adjoining figure is (C₁= 20 e.s.u., C₂ = 30 e.s.u., C3 =15 e.s.u. and V = 90 e.s.u.) (a) 10 e.s.u. (b) 30 e.s.u. (c) 40 e.s.u. (d) 20 e.s.u.

If & 1 = 4.0 V, & 2 = 12.0 V, R₁ = 42, R₂ = 122, C = 3 μF, Q = 18 µC, and I = 2.5 A, what is the potential difference V₁ - Vb? R₁ +11 &₁ bow ! R₂ - 30 V O 30 V O 5.0 V & = O -5.0 V 1₁ e 30

The graph and data of experimental equipotential lines for an electric dipole consisting of 2 opposite charges is shown below: D-D + + + + + ++ + ++ + to + + + G + ++ 4. A + + 14 + + 9 + %23 + e + + + +4 + O + + + ++ +4 ++ + + + + + + ++ ++ + ++ + ++ +++ 4. + + AIN 245 U + + + ++ +++ + + + + + +/+ + /+ + ++ + + + + + + + + +\+ + + + to -+ + + ++ + ++ + + + + ++ + + + + + + + + + A + + -2 Initial Point Voltage Δν Ad (m) |El=(AV/Ad) [v/m] 1 1.05 V 2 1.81 V 0.75 0.02 37.5 3 2.45 V 0.64 0.02 32.0 4 3.15 V 0.70 0.02 35.0 5 3.92 V 0.77 0.02 38.5 1. If you drop a charge on this line, will it move? 2. Will it move along the electric field line or the equipotential line?

Consider what happens when a person moves around in dry conditions. The rubbing of motion leads to static electric charge building up on the body. Assume the capacitance of the human body to be about 155 pF. a) How much charge would have to build up on a body to generate a potential difference of 10 kV? b) A particular cell phone can have its circuits destroyed if exposed to an electric shock containing 300 u.J of energy. What voltage does that correspond to if the shock is coming from a human body?

A dielectric-filled parallel-plate capacitor has plate area AAA = 30.0 cm2cm2 , plate separation ddd = 10.0 mmmm and dielectric constant kkK = 3.00. The capacitor is connected to a battery that creates a constant voltage VVV = 5.00 VV . Throughout the problem, use ϵ0ϵ0epsilon_0 = 8.85×10−12 C2/N⋅m2C2/N⋅m2 . The dielectric plate is now slowly pulled out of the capacitor, which remains connected to the battery. Find the energy U2U2U_2 of the capacitor at the moment when the capacitor is half-filled with the dielectric. The capacitor is now disconnected from the battery, and the dielectric plate is slowly removed the rest of the way out of the capacitor. Find the new energy of the capacitor, U3U3U_3.In the process of removing the remaining portion of the dielectric from the disconnected capacitor, how much work WWW is done by the external agent acting on the dielectric?