Conceptual Physics

26.4 - Energy in capacitors Capacitors store energy. A battery or other device performs work as its electric field pulls electro ...

26.5 - Interactive checkpoint: energy in a fuel-cell car In this problem, assume that road friction, air resistance, and electri ...

The defibrillator capacitor discharges in 11 ms. How much current does it send through the heart? C = q/ǻV q = CǻV = (68 × 10í^6 ...

This means there is a layer of negative charges adjacent to the positive plate of the capacitor and a layer of positive charges ...

Capacitance with dielectric present Cț = țC Cț = capacitance with dielectric ț = dielectric constant C = capacitance with vacuum ...

26.9 - Sample problem: dielectric and potential difference Variables Strategy Use the definition of capacitance, and the equati ...

This result is interesting when applied to the potential energy PEe = ½C(ǻV)^2 stored by a capacitor. After you insert a dielect ...

26.12 - Gotchas The total amount of charge on the plates of a capacitor is designated by q. No, the amount of charge on one plat ...

Chapter 26 Problems Conceptual Problems C.1 If you increase the potential difference between the plates of a capacitor, what hap ...

much potential energy is stored in the capacitor? J 4.3 How much potential energy is stored in a 2.10eí6 F capacitor charged by ...

27.0 - Introduction Electric circuits include components such as batteries, resistors and capacitors. These basic elements can b ...

current passes through the filament, electrons lose energy in collisions with the atoms of the filament, and the filament’s temp ...

emf, the volt, equals joules per coulomb. You can think of a nine-volt battery as doing nine joules of work on each coulomb of c ...

charge rather than a negative one. In any case, clockwise or counterclockwise, positive or negative, the principle holds that th ...

is no detour path for the current to follow. This phenomenon is explored in more detail in Example 1. Two light bulbs are wired ...

Physics principles and equations With components in series, the total potential difference equals the sum of the potential diffe ...

27.9 - Parallel wiring Parallel wiring: Circuit wiring that branches. The same potential difference exists across each branch. I ...

Derivation Variables Strategy Find the total current flowing through all the resistors combined. Use Ohm’s law to rewrite the c ...

27.12 - Circuits with series and parallel wiring Circuits commonly include some components that are wired in series and some tha ...

whether the resulting equivalent resistance is in series or parallel with other resistors. Continue this process until the circu ...