Test
Ch. 22
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Preguntas del test (26)
1Electrostatics is a branch of electricity that focuses on
- Aelectrical force.
- Belectric charge.
- Cboth of these when static.
- Dnone of the above.
2The force that binds atoms together to form molecules is
- Aelectrical.
- Bcentripetal.
- Cgravitational.
- Dnuclear.
- Enone of the above
3A fundamental rule of electricity is that
- Alike kinds of charges repel.
- Bunlike kinds of charges attract.
- Cboth of these
- Dneither of these
4The vast numbers of electrons in a coin don't fly off the surface because
- Athey are strongly bonded to their atoms.
- Bthey are attracted by an equal number of protons.
- Cmutual repulsion is incomplete.
- Dall of the above
- Enone of the above
5Which of these does NOT have an electrical charge?
- Aneutron
- Bproton
- Celectron
- Dall of the above
- Enone of the above
6Which of these has the greatest mass?
- Aproton
- Belectron
- Cboth of these
- Dneither of these
7To become a negative ion, an atom must
- Again an electron.
- Bgain a proton.
- Close an electron.
- Dlose a proton.
8Two protons attract each other gravitationally and repel each other electrically. The stronger of these two forces is
- Aelectrical.
- Bgravitation.
- Cneither of these
9The electrical force between electric charges depends only on their
- Aare weaker.
- Bobey the inverse-square law.
- Cattract.
- Drepel or attract.
- Eact over shorter distances.
- Fboth of these
- Gneither of these
10The electrical force between electric charges depends only on their
- Aseparationdistance
- Bmagnitude.
- Cboth of these
- Dneither of these
11When the distance between two charges is halved, the electrical force between them
- Adoubles.
- Bquadruples.
- Cis reduced by 1/4.
- Dhalves.
- Enone of the above
12 Particle A has twice the charge of nearby particle B. Compared to the force on Particle A, the force on Particle B is
(Hint: think of Newton's third law)- Atwice as much.
- Bfour times as much.
- Chalf as much.
- Dthe same.
- Enone of the above
13Two charges that are separated by one meter exert 1-N forces on each other. If the charges are pushed together so the separation is 25 centimeters (quarter of meter), the force on each charge will be
- A8 N.
- B16 N.
- C2 N.
- D1 N.
- E4 N.
14Two charged particles repel each other with a force F. If the charge of one of the particles is doubled and the distance between them is halved, then the force will be
- AF/4.
- BF/2.
- CF.
- D2 F.
- E8 F
15Two charged particles attract each other with a force F. If the charges of both particles are doubled, and the distance between them also doubled, then the force of attraction will be
- AF/4.
- BF.
- C2 F.
- DF/2.
- Enone of the above
16Conducting materials are composed of atoms with
- Aloose outer electrons.
- Bvastly more charge than insulators.
- Cstrong cohesive forces between them.
- Dexcess neutrons compared with protons.
17 Insulating materials are composed of atoms with
- Atightly bound outer electrons.
- Bvastly more charge than conductors.
- Cexcess protons.
- Dweak cohesive forces.
18Electrons can be transferred from one place to another by the process of
- Acontact, which means touching.
- Binduction, which means non-touching.
- Cfriction.
- Dall of the above
- Enone of the above
19If you comb your hair and the comb becomes positively charged, then your hair becomes
- Anegatively charged.
- Buncharged.
- Cpositively charged.
20A positively-charged rod is held near an aluminum can that rests on a dry wood table. If you momentarily touch the opposite side of the can with your finger, the can becomes
- Anegatively charged.
- Bpartially discharged.
- Cpositively charged.
- Dcompletely discharged.
- Enone of the above
21An electroscope is charged positively as indicated by foil leaves that stand apart. As a negative charge is brought close to the electroscope, the leaves become
- Acloser together.
- Bmotionless.
- Cfarther apart.
22If you rub an inflated balloon against your hair and place the balloon against the wall it will stick to the wall, illustrating
- Acharge polarization.
- Bvoltage.
- CCoulomb's law.
- Dconduction and insulation.
23A common naturally-polarized bit of matter is
- Aan electron.
- Ba water molecule.
- Ca hydrogen atom
- Dall of the above
- Enone of the above
24A balloon will stick to a wooden wall if the balloon is charged
- Anegatively.
- Bpositively.
- Ceither of these
- Dneither of these
25Electric potential, measured in volts, is the ratio of electric energy to the amount of electric
- Acurrent.
- Bvoltage.
- Ccharge.
- Dresistance.
- Enone of the above
26Polin safely touches a 100,000-volt Van de Graaff generator. Although the voltage is high, the relatively small amount of charge means a relatively small amount of
- Aenergy transfer.
- Bconduction.
- Celectric field.
- Dpolarization.
Información
- Descripción
- Physics Ch. 22 (UNDER CONSTRUCTION)
- Autor
- Winston Schultz
- Idioma
- English
- Visitas
- 31
- Etiquetas
- Valoración
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