In Figure (a) below, a 9.00 V battery is connected to a resistive strip that consists of three sections with the same cross-sectional areas but different conductivities. Figure (b) gives the electric potential V(x) versus position x along the strip. The horizontal scale is set by x 9.68 mm. Section 3 has conductivity 3.018 x 107 (0-m)¹. What is the conductivity of section (a) 1 and (b) 2? (a) Number (b) Number (a) (6) Units Units [ x-0 x-x₂ x (mm)

Air isn’t a perfect electric insulator, but it has a very high resistivity. Dry air has a resistivity of approximately 3 x 1013 Ω • m. A capacitor has square plates 10 cm on a side separated by 1.2 mm of dry air. If the capacitor is charged to 250 V, what fraction of the charge will flow across the air gap in 1 minute? Make the approximation that the potential difference doesn’t change as the charge flows.

In the figure below, ℰ1 = 5.00 V, ℰ2 = 4.00 V, R1 = 1.00 Ω, R2 = 3.00 Ω, R3 = 3.00 Ω, and both batteries are ideal. (part 2) (d) What is the power of battery 1? (Include the sign of the value in your answer. A negative sign indicates absorption of energy and a positive sign indicates an energy output.) __________________W(e) What is the power of battery 2? (Include the sign of the value in your answer. A negative sign indicates absorption of energy and a positive sign indicates an energy output.) ___________________W (please show the units when working through the problem so that I can follow it easier)

A rod of semiconducting material of Length L=2 m and cross-sectional area A=4 mm2 lies along the x-axis between x=0 and x=L. The material obeys ohm’s Law, and its resistivity varies along the rod according to ρ = ρ0*( 1 - x2/L2) where ρ0=3 x 10-4 Ω.m. The end of the rod at x=0 is at potential V0=25 V greater than the end at x=L.    What is the electric potential, in units of volt, in the rod at x=L/2?

The thickness of the cell membrane is 5 nm, the potential inside the cell is - 65 mV, the potential outside the cell is +10 mV. The electric field strength in the membrane is (kV/m) (give the modulus of magnitude)

What is the thickness of a specific cell membrane if we measure a constant electric field of 3.0 MV/m and a potential of 30 mV across it?

(I) What potential difference is needed to give a helium nucleus(Q=2e) 85.0 keV of kinetic energy?

where V1 = V2 = 2.00 V. How much work are the batteries in the circuit doing in every 10.0-s time interval?

A capacitive with two parallel plates of a capacity (C) was connected to a battery with a potential difference between its poles (15V), then an insulator was inserted between its two plates instead of air with a constant isolation (2), so the charge stored in any of its plates was (600MC) what is the amount? First: the capacitance of the expansion before the insulator. Second: The energy stored in the electric field between two plates of width before and after inserting the insulator.

A spark plug in a car engine consists of two metal conductors separated by a distanceof 0.75 mm. When an electric spark jumps between them, the magnitude of the electricfield is 4.7 · 107 V/m. What is the magnitude of the potential difference ∆V between theconductors?