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Electrostatics

Physics Chapter 32

QuestionAnswer
The fundamental force underlying all chemical reactions is Electrical
Two charges are separated by a certain distance. If the magnitude of each charge is doubled, the force on each charge is quadrupled.
The charge distribution in some molecules is permanently separated into positive and negative regions. Such molecules are called electric dipoles.
Two charged particles held close to each other are released. As they move, the force on each particle increases. Therefore, the particles have opposite signs.
Particle A has twice as much charge as particle B. Compared to the force on particle A, the force on particle B is the same.
The reason a charged balloon will stick to a wall is that induced opposite charges in the wall are closer than other wall charges.
Bring a charged object near a conductor and then momentarily touch the conductor. This demonstrates charge by induction.
Objects can be charged by induction, friction, touching
A positive ion has more protons than electrons
This law states that the force between any two charges depends directly on the size of the charges and inversely on the square of the distance between the charges Coulomb's law
When the distance between two charges is halved, the electrical force between the charges quadruples
A difference between electrical forces and gravitational forces is that electrical forces include repulsive interactions
To be safe in the unlikely case of a lightning strike, it is best to be inside a building framed with steel
A 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 positively charged
To charge an object by induction, the process of grounding may or may not occur
Semiconductors can be made to conduct electricity and they can also be made to act like good insulators. True
Particle A has twice as much charge as particle B. Compared to the force on particle A, the force on particle B is the same
Much electronic equipment contains transistors and diodes that are made from semiconductors. Semiconductors can be very good insulators, can conduct electricity and contain helpful impurities.
When a charged cloud passes overhead, the ground below is charged by induction
Electrical polarization occurs when charge distribution in a neutral molecule separates
Created by: Cinda
 

 



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