Conceptual Physics: Unit 15 Review
either positively or negatively
A balloon will stick to a wooden wall if the balloon is charged?
repel or attract
A main difference between gravitational and electric forces is that electrical forces is that they?
positively charged
A negatively charged rod is held near a metal can that rests on a dry wood table. If you touch the opposite side of the can momentarily with your finger the can is then?
increases
A positive charge and a negative charge held near each other are released. As they move, the force on each particle?
protons than electrons
A positive ion has more?
attract
An electron and a proton ____ each other.
fall closer together
An electroscope is charged positively as shown by foil leaves that stand apart. As a negative charge is brought close to the electroscope, the leaves?
becomes charged by induction
An uncharged pith ball is suspended by a nylon fiber. When a negatively charged rubber rod is brought nearby, without touching it, the pith ball?
negatively charged
If you comb your hair and the comb becomes positively charged, then your hair becomes?
charge and energy
Normally a small party balloon charged to several thousand volts will have a relatively small amount of?
the same
Particle A has twice the charge of nearby particle B. Compared to the force on Particle A, the force on Particle B is?
negatively charged
Rub electrons from your hair with a comb and the comb becomes?
positive ion
Strip electrons from an atom and the atom becomes a?
magnitude and separation distance
The electrical force between charges depends only on the charges?
close together
The electrical force between charges is strongest when the charges are?
loosely bound
The reason that charge carriers in a metal are electrons rather than protons because electrons are?
a specific large number of electrons
The unit of electric charge, the coulomb, is the charge on?
Electrons
To say an object has a negative charge is to say it has an excess of what kind of charges?
its charges have been rearranged
To say that an object is electrically polarized is to say that?
can be neither created nor destroyed
To say that electric charge is conserved is to say that electric charge?
net charge has been created or destroyed
To say that electric charge is conserved means that no case has ever been found where the?
F
Two 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?
opposite signs
Two charged particles held close to each other are released. As they move, the force on each particle increases. Therefore, the particles must have?
the same sign
Two charged particles held near each other are released. As they move, the acceleration of each decreases. Therefore, the particles have?
F/2
Two 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 also doubled, then the force will be?
quadruples
When the distance between two charges is halved, the electrical force between the charges?
energy
You can touch a 100,000-volt Van de Graaff generator with little harm because although the voltage is high, the relatively small amount of charge means there is a relatively small amount of?