Test
Electrostatics Unit Evaluation
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Preguntas del test (38)
1Atomic nuclei of almost all elements consist of
- Aonly neutrons.
- Bprotons and electrons.
- Cneutrons and electrons.
- Donly protons.
- Eprotons and neutrons.
2Protons and electrons
- Aattract each other.
- Brepel each other.
- Cdo not interact.
3The fundamental force underlying all chemical reactions is
- Aelectrical.
- Bgravitational.
- Ccentripetal.
- Dnuclear.
- ENone of the above
4Coulomb's law says that the force between any two charges depends
- Adirectly on the size of the charges.
- Binversely on the square of the distance between the charges.
- CAll the above
- DNone of the above
5Two charges are separated by a certain distance. If the magnitude of each charge is doubled, the force on each charge is
- Ahalved.
- Bdoubled.
- Ctripled.
- Dquadrupled.
6A positive ion has
- Amore electrons than protons.
- Bmore protons than electrons.
- Ca +1 charge always.
- Done proton.
7If you comb your hair and the comb becomes positively charged, your hair becomes
- Auncharged.
- Bpositively charged.
- Cnegatively charged.
8To say that electric charge is conserved means that no case has ever been found where
- Athe total amount of charge on an object has increased.
- Bone object has more charge than another object.
- Cthe total charge on an object has changed.
- Dnet charge has been created or destroyed.
- ENone of the above
9A difference between electrical forces and gravitational forces is that electrical forces include
- Ainfinite range.
- Brepulsive interactions.
- Cthe inverse square law.
- Dseparation distance.
- ENone of the above
10In a good insulator, electrons are usually
- Anot moving at all.
- Bfree to move around after an impurity has been added.
- Cfree to move around.
- Dtightly bound in place.
- Esemi-free to move around.
11Objects can be charged by
- Ainduction.
- Bfriction.
- Ctouching.
- DAll of the above
- ENone of the above
12To be safe in the unlikely case of a lightening strike, it is best to be inside a building framed with
- Asteel.
- Bwood.
- Ceither steel or wood.
13A conductor differs from an insulator in that a conductor has
- Amore protons than electrons.
- Bfaster-moving molecules.
- Cmore electrons than protons.
- Dmore electrons than an insulator.
- ENone of the above
14A negatively charged rod is brought near a metal can that rests on a wood table. You touch the opposite side of the can momentarily with your finger. The can is then
- Apositively charged.
- Bnegatively charged.
- Ccharged the same as it was.
- Duncharged.
15An electroscope is charged positively, as shown by foil leaves that stand apart. As a negatively charged rod is brought close to the electroscope, the leaves
- Aspread farther apart.
- Bdo not move.
- Cmove closer together.
16Lightning bolts occur between
- Aclouds and the ground.
- Bclouds.
- Cclouds and clouds and the ground.
17When a charged cloud passes overhead, the ground below is charged by
- Ainduction.
- Bpolarization.
- Cdeduction.
- Delectrification.
18Bring a charged object near a conductor and then momentarily touch the conductor. This demonstrates charge by
- Adeduction.
- Bpolarization.
- Cinduction.
- Delectrification.
19The reason a charged balloon will stick to a wall is that
- Ainduced opposite charges in the wall are closer than other wall charges.
- Bthe rubber of the balloon simply sticks to walls.
- Celectrons transfer back and forth between the wall and the balloon.
- Dthe charge is slightly sticky and acts like glue.
- ENone of the above
20Two charged particles held close to each other are released. As the move, the force on each particle increases. Therefore, the particles have
- Aopposite signs.
- Bthe same sign.
- Ccharges that cannot be determined.
21Two charged particles held near each other are released. As they move, the acceleration of each decreases. Therefore, the particles have
- Aopposite signs.
- Bthe same sign.
- Ccharges that cannot be determined.
22How many different kinds of force would act on a proton placed in both an electric field and a gravitational field?
- AOne
- BNone
- CTwo
23The SI unit of charge is the
- Aohm.
- Bjoule.
- Ccoulomb.
- Dampere.
- Enewton.
24Particle A has twice as much charge as particle B. Compared to the force on particle A, the force on particle B is
- Ahalf as much.
- Btwo times as much.
- Cfour times as much.
- Dthe same.
- ENone of the above
25A 2-C charge and a 4-C charge attract each other with 10 N of force. How much will a 2-C charge and a 12-C charge attract each other when placed the same distance apart?
- A5 N
- B12 N
- C10 N
- D30 N
- E60 N
26Two charges separated a distance of 1.0 meter exert a 2.0-N force on each other. If the charges are pushed to a separation of 1/3 meter, the force on each charge will be
- A2.0 N
- B1.5 N
- C3.0 N
- D6.0 N
- E18.0 N
27Two charges separated by a distance of 1 meter exert a 2-N force on each other. If the magnitude of each charge is doubled, the force on each charge is
- A2 N
- B4 N
- C8 N
- D16 N
- ENone of the above
28The study of electricity at rest is electrostatics.
- AVerdadero
- BFalso
29Electrical forces are strong, but in comparison, gravitational forces are stronger.
- AVerdadero
- BFalso
30All electrons are identical; all have exactly the same mass and charge.
- AVerdadero
- BFalso
31Coulomb's law says that there are two kinds of charges, positive and negative.
- AVerdadero
- BFalso
32Coulomb's law for electrical charges has the same mathematical form as Newton's law of gravitation.
- AVerdadero
- BFalso
33A material is a good insulator if outer electrons of atoms in the material are free to roam around.
- AVerdadero
- BFalso
34A material that is a good insulator of electricity is normally a poor conductor of electricity.
- AVerdadero
- BFalso
35Semiconductors can be made to conduct electricity and they can also be made to act like good insulators.
- AVerdadero
- BFalso
36When we allow charges to move onto of off a conductor by touching it with something connected to Earth, it is common to say that we are grounding it.
- AVerdadero
- BFalso
37A bolt of lightning is a result of charging by induction.
- AVerdadero
- BFalso
38An atom that is electrically polarized vibrates in only one direction.
- AVerdadero
- BFalso
Información
- Descripción
- 11th grade (Reflection and Refraction & Electrostatics) Physics Test sobre Electrostatics Unit Evaluation, creado por Olivia Gibbs el 09/04/2015.
- Autor
- Olivia Gibbs
- Idioma
- English
- Visitas
- 13
- Historial
- Creado el 9 abr 2015 · actualizado el 1 jun 2016
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