College Physics

PhET Explorations: John Travoltage Make sparks fly with John Travoltage. Wiggle Johnnie's foot and he picks up charges from the ...

Example 18.1 How Strong is the Coulomb Force Relative to the Gravitational Force? Compare the electrostatic force between an ele ...

In the same way, the Coulomb force field surrounding any charge extends throughout space. Using Coulomb’s law,F=k|q 1 q 2 | /r^2 ...

Discussion Thiselectric field strengthis the same at any point 5.00 mm away from the chargeQthat creates the field. It is positi ...

Note that the electric field is defined for a positive test chargeq, so that the field lines point away from a positive charge a ...

arrows point directly away from the positive charges that create them. The arrow forE 1 is exactly twice the length of that forE ...

Figure 18.26(a) Two negative charges produce the fields shown. It is very similar to the field produced by two positive charges, ...

The four nucleotide bases are given the symbols A (adenine), C (cytosine), G (guanine), and T (thymine). The order of the four b ...

Figure 18.30When an electric fieldEis applied to a conductor, free charges inside the conductor move until the field is perpendi ...

Just outside a conductor, the electric field lines are perpendicular to its surface, ending or beginning on charges on the surf ...

Figure 18.35Excess charge on a nonuniform conductor becomes most concentrated at the location of greatest curvature. (a) The for ...

Figure 18.37(a) A lightning rod is pointed to facilitate the transfer of charge. (credit: Romaine, Wikimedia Commons) (b) This V ...

Xerography Most copy machines use an electrostatic process calledxerography—a word coined from the Greek wordsxerosfor dry andgr ...

Figure 18.41The nozzle of an ink-jet printer produces small ink droplets, which are sprayed with electrostatic charge. Various c ...

Integrated Concepts The Integrated Concepts exercises for this module involve concepts such as electric charges, electric fields ...

Coulomb force: Coulomb interaction: Coulomb’s law: conductor: conductor: dipole: electric charge: electric field lines: electric ...

ink-jet printer: insulator: ionosphere: laser printer: law of conservation of charge: photoconductor: point charge: polar molecu ...

F=k| q 1 q 2 | r^2 , whereq 1 andq 2 are two point charges separated by a distancer, andk≈ 8.99×10^9 N · m^2 / C^2 This Coulomb ...

5.When a glass rod is rubbed with silk, it becomes positive and the silk becomes negative—yet both attract dust. Does the dust h ...

cell and the surrounding cell membrane. Include on this diagram the charge distribution and the corresponding electric field. Is ...