Capacitance

Electric Current

Electric Current Ia reminds us, an isolated conducting loop-regardless of whether it has an excess charge-is all at the same potential. No electric field can exist within. it or along its surface. Although conduction electrons are available, no net electric force acts on them and thus th re is no current. If, as in , we insert …

Electric Current Read More »

Moving Charges and Electric Currents

Moving Charges and Electric Currents Chapters 22 through 26 deal largely with- electrostatics-that is, with charges  at rest. With this chapter we begin to focus on electric currents-that is, charges in motion. examples of electric currents abound, ranging from the large currents that constitute lightning strokes to the tiny nerve currents that regulate’nor muscular activity. …

Moving Charges and Electric Currents Read More »

Capacitance

Capacitance During ventricular fibrillation, a common type of heart attack, the chambers of the heart fail to pump blood  because their muscle fibers randomly contract and relax. To save a victim of ventricular fibrillation, the heart muscle must be shocked to reestablish its normal rhythm. For that, 20 A of current must be sent through …

Capacitance Read More »