The current through inductance l is given by i=i0e−t/τ a.) find an expression for the potential difference δvl across the inductor. b.) evaluate δvl at t=0s , if l=15mh , i0=36ma , and τ=1.1ms c.) evaluate δvl at t=1ms , if l=15mh , i0=36ma , and τ=1.1ms d.) evaluate δvl at t=2ms , if l=15mh , i0=36ma , and τ=1.1ms e.) evaluate δvl at t=3ms , if l=15mh , i0=36ma , and τ=1.1ms

Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.

On a mild saturday morning while people are working inside, the furnace keeps the temperature inside the building at 23degreesc. at noon the furnace is turned off, and the people go home. the temperature outside is a constant 16degreesc for the rest of the afternoon. if the time constant for the building is 3 hr, when will the temperature inside the building reach 18degreesc? if some windows are left open and the time constant drops to 2 hr, when will the temperature inside reach 18degreesc?

How many excess electrons must be present on each sphere if the magnitude of the force of repulsion between them is 4.57×10−21 newtons?