7 electrostaticirca Flashcards
What does energy mean
Ability to do work
What is SI unit for energy
joule (J)
Energy cannot ….
Be created nor destroyed but it can exist in various forms
What is nuclear energy
Energy released in atoms during fission & fusion
What is source of biomass energy
Animal & plant waste
What are radioactive substances
Uranium, Plutonium
What are fossil fuels
Coal, petroleum, neatural gas
What is electrostatic charges
Static electric charges that can transfer between objects
What is electrostatic force
Attraction and repulsion between electric charge
After cloth is rubbed with comb, what happens
Comb -> gains electrons -> Negatively charged
Attracts pieces of paper -> force of attraction that exists between positive charge on paper & negative charge on comb
What is the function of electroscope
Detect the existence of electric charges on an object
What happens when neutral strip is place on electroscope
Gold leaf does not diverge bc pos & neg charges are attracted to one another
What happens when pos & neg strip is place on electroscope
Gold leaf diverges bc same charges repel each other
Pos -> Neg charges go up to metal cap
Neg -> Neg charges go down
Divergence of gold leaf relationship
Further divergence, higher quantity of electrostatic charges accumulated
Explain the electrostatics in lightining
Friction between clouds & air -> charged with electric charge
Lightning -> result of attraction force between pos on ground & neg in clouds
