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Physics
lap 6 cc
| Question | Answer |
|---|---|
| electron characteristics | - rest mass: 9.11 x 10^-31 kg - negative - size of electron: 1 x 10^18 m |
| proton characteristics | - rest mass: 1.672 x 10^-27 kg - positive - size of proton: 1 x 10 ^15 m |
| neutron characteristics | - rest mass: 1.674 x 10^-27 kg - neutral - size: 1 x 10^15 m |
| in an atom the # of protons equals the # of electrons | true |
| the # of protons plus the # of neutrons in an atom's nucleus gives the atomic number | true |
| imbalance of charge in an atom | ion |
| when you charge an atom it's the | electrons you affect not the protons |
| when electrons are freed from outer energy levels of atoms | static energy |
| materials thru which an electric charge flows quite readily | conductors |
| materials thru which an electric charge is not readily transferred | insulators |
| examples of conductors | gold, silver, copper, (any metal) |
| examples of insulators | rubber, plastic, paper |
| What can be used to create charges on objects? | friction |
| the law of electrostatics | like charges repel; unlike charges attract |
| when you have separated charges in an object so that there are two oppositely charged sides | polarization/induction |
| positive ion | electron loser |
| negative ion | electron gainer |
| one way electricity can be transferred thru contact | static electricity |
| charge of 1 proton | 1.6 x 10^-19 |
| charge 1 electron | -1.6 x 10^-19 |
| How much is the charge of an electron and proton? | 6.25 x 10^18 |
| total charge formula | q=ne |
| the net charge of an isolated sys remains constant | law of the conservation of charge |
| the electric force btwn 2 charged objects will be proportional to the product of the magnitudes of the charges and inversely proportional to the square distance btw the charges | columb's law of electrostatics |
| the effect of a medium added into the charge | dielectric constant |
| induction causes sides that attract to move other charge away | true |
| attracted to charged plates in the precipitator, removing them from emitted gases | polarized particles |
| due to induction when a charged cloud is near the ground, the surface becomes charged thus creating a potential difference that allows the movement of electrons from one location to another | true |
| the greater the number of electric field lines (the density) | the stronger the electric field (has nothing to do w the length of the lines) |
| density greatest near the | charge |
| types of fields | gravitational, electric, and magnetic |
| through fields one object | transmits its "force" to another object |
| if one places a + charge in an electric field, the + charge will go in the direction | of the field lines to the FORCE created |
| if one places a - charge in an electric field, the + charge will go in the | the opposite direction of the field lines due to the FORCE created |
| the lines of the electric field originate on the positive charge and terminate on the negative charge | true |
| the unit of electric field strength | N/C |
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