Physics Electrostatics quiz

Coulombs Law

Inversely proportional to the square of the separation between the two particles and is along the line joining them as well as proportional to the product of the magnitudes of the charges q1 and q2 on the two particles, KE= |q1||q2|/r²

Types of Charges

proton (+ charge), electron (-charge), e=1.6×10^-19C

Conductors

materials in which the electric charges move freely, copper, silver, aluminum

Insulators

materials in which electric charges do not move freely, glass, plastic, rubber

Semi-conductors

the characteristics are between those of insulators and conductors, germanium, silicon

Charging by Conduction

a charged object is placed in contact with another object

Charging by Induction

an object is connected to a conducting wire or pipe burned in the earth, it is said to be grounded

Van De Graaff Generator

a machine designed and built by Robert J. Van de Graaff that is designed to teach students how static electricity works. When touched, the generator sends electrons through someone’s body that causes their hair to become static.

electron

the electron is a subatomic particle that is found in all atoms. Unlike protons, neutrons, or the nuclei of atoms, electrons are elementary particles

Proton

a positively charged particle that is found in the nucleus of every atom. One of the three basic subatomic particles that make up atoms along with electrons and nuetrons

Nuetrons

Subatomic particles found inside the nucleus of every atom. They have a neutral electric charge (neither negative nor positive) and have slightly more mass than positively charged protons

Electric Field of a Charge

Describes the region of space where a charged particle experiences a force due to the presence of another charge

What will happen to two objects with the same static charge?

they will repel each other

What machine is used by teachers to show static electricity?

Van de Graff Generator

What are all substances made from?

atoms

What happens to an atom if it gains an electron?

it becomes negative

Which is an example of the build-up of static electricity?

lighting

Which part of atoms causes static electricity?

electrons

Units on electric field are__

newtons/Coulomb

Positive Negative or Neutral

Positive

Positive Negative or Neutral

Negative

Positive negative or neutral

neutral

What is the charge on a proton?

1.6×10^-19 C

True or False: Carbon is more conductive than pure water

True

A neutral hydrogen atom has one proton and one electron; if you remove the electron, what will be the leftover charge?

Positive

A charge distribution has electric field lines pointing into it. What sign is the net charge?

negative

If you double the distance between 2 point charges, by which factor does the force between the particles change?

1/4

This is???

Electric Field Pattern

This is??

Proton

Names of Scientists

William Gilbert (1600), Charles Coulomb (1785), Hans Oersted (1820), Michael Faraday, James Clerck Maxwell (1865-1873), Hertz