physics definitions (10)

Question 1

magnetic field

Answer 1

region in space where another magnet or ferromagnetic material will experience a non contact force

Question 2

the principal of conservation of charge

Answer 2

the net charge of an isolated system remains constant during any physical process

Question 3

principal of charge quantinization

Answer 3

the observed charge of an isolated is always an integral multiple of “e” (1,6 x 10-19C)

Question 4

potential difference

Answer 4

work done per unit positive charge

Question 5

current

Answer 5

the rate of flow of charge

Question 6

resistance

Answer 6

materials opposition to the flow of electrical charge

Question 7

ampere

Answer 7

a unit of electric current equals to a flow of one coulomb per second

Question 8

emf

Answer 8

(electromotive force) the total energy supplied per coulomb of charge by the cell

Question 9

the law of the conservation of energy

Answer 9

the total energy of a system cannot be created or destroyed only transformed from one form to another

Question 10

ferromagnetic

Answer 10

a substance that shows spontaneous magnetism

Question 11

temporarily dipole

Answer 11

each molecule now has a slightly positive and slightly negative charge

Question 12

electrostatic force

Answer 12

the force exerted by non moving charge

Question 13

coulomb’s law of electrostatic forve

Answer 13

two point charges in free space exert forces on eachother the force is directly proportional to the product of the charges and inversely proportional to the square of the distance between the charges

Question 14

power

Answer 14

is the rate at which work is done

Question 15

electrical energy

Answer 15

the product of the power dissipated and the take taken measured in joule

Question 16

ohms law

Answer 16

current through a conductor is directly proportional to the potential difference across the conductor at a constant temperature