Science_Charges_Quiz

Is this statement true? "A positively charged object is an object that has an excess of positive electrons."

No, a positively charged object is an object that has more positive protons than electrons.

Electrical forces can?

Can cause objects to attract or repel each other

Upon entering the room, you observe two balloons suspended from the ceiling. You notice that instead of hanging straight down vertically, the balloons seems to be repelling each other. You can conclusively say . . .

Both balloons are charged with the same type of charge

What do the opposite of charges do?

Attract

What are the charged parts of an atom?

Electrons and protons

TRUE or FALSE: An object that becomes grounded gains neutrons during the grounding process.

FALSE

TRUE or FALSE: An object that is electrically neutral contains only neutrons.

False

TRUE or FALSE: An object that is negatively charged could contain only electrons with no accompanying protons.

False

TRUE or FALSE: An object that is positively charged contains all protons and no electrons.

False

What do the same of a charge do?

Repel

Saran Wrap has a larger electron affinity than Nylon. If Nylon is rubbed against Saran Wrap, which would end up with the excess negative charge? ____________ Explain.

Saran wrap, because it likes electrons more.

A rubber balloon possesses a positive charge. If brought near and touched to the door of a wooden cabinet, it sticks to the door. This does not occur with an uncharged balloon. These two observations can lead one to conclude that the wall is _____. a. electrically neutral b. negatively charged c. a conductor d. lacking electrons

a. electrically neutral

Which of the following materials are likely to exhibit more conductive properties than insulating properties? _____ Explain your answers. a. rubber b. aluminum c. silver d. plastic e. wet skin

b. aluminum c. silver Medal-conductor e. wet skin a. rubber d. plastic Insolator

A positively charged pop can is touched by a person standing on the ground. The pop can subsequently becomes neutral. The pop can becomes neutral during this process because ______. a. electrons pass from the pop can to the person (ground) b. electrons pass from the person (ground) to the pop can c. protons pass from the pop can to the person (ground) d. protons pass from the person (ground) to the pop can

b. electrons pass from the person (ground) to the pop can

Which statement best explains why a rubber rod becomes negatively charged when rubbed with fur? a. The rubber that the rod is made of is a better insulator than fur. b. The fur is a better insulator than the rubber. c. Molecules in the rubber rod have a stronger attraction for electrons than the molecules in the fur. d. Molecules in the fur have a stronger attraction for electrons than the molecules in the rubber rod.

c. Molecules in the rubber rod have a stronger attraction for electrons than the molecules in the fur.

During a physics lab, a plastic strip was rubbed with cotton and became positively charged. The correct explanation for why the plastic strip becomes positively charged is that ... a. the plastic strip acquired extra protons from the cotton. b. the plastic strip acquired extra protons during the charging process. c. protons were created as the result of the charging process. d. the plastic strip lost electrons to the cotton during the charging process.

d. the plastic strip lost electrons to the cotton during the charging proces

A physics student, standing on the ground, touches an uncharged plastic baseball bat to a negatively charged electroscope. This will cause ___. a. the electroscope to be grounded as electrons flow out of the electroscope. b. the electroscope to be grounded as electrons flow into the electroscope. c. the electroscope to be grounded as protons flow out of the electroscope. d. the electroscope to be grounded as protons flow into the electroscope. e. the baseball bat to acquire an excess of protons. f. absolutely nothing (or very little) to happen since the plastic bat does not conduct.

f. absolutely nothing (or very little) to happen since the plastic bat does not conduct.