just basic science Flashcards
What is electric current?
an electric current is the rate of flow of electric charge
What is potential difference?
between any two point is the amount of energy needed to move one unit of electric charge from one point to the other.
What is resistance?
resistance of a component is the ratio of potential difference across it to the current flowing through it.
What is a force?
push or pull
what is friction?
friction is when there are two things rubbing together.
what are non-contact forces
non-contact forces are forces that act on an object without touching.
example: gravitational force, electrostatic and magnetic force.
What is gravitational force?
force that attracts object to the planet.
What is electrostatic force?
attractive or repulsive forces between particles that are caused by their electric charges
What is magetic force?
the force exerted by a magne on magnetic materials such as iron and steel
What is power?
power is a circuit component is the amount of elecrical energy converted to other forms of energy per uni time by component.
What is speed
speed is the distance travelled per unit time.
What is pressure?
the amount of force acting perpendicularly on a unit area.
What is energy?
energy is the ability to do work,its cannot be created or destroy but can only be converted.
The human ear?
external ear,ear canal,eardrum,hammer,anvil,stirrup,semicir
