Electricity Flashcards
What name is given to the objects that let currents pass through them, why
Conductors, because only most of their electrons are held tightly by their atom allowing some electrons to move
What name is given to the objects that don’t let currents pass through them, why
Insulators, because electrons are held tightly by their atoms and aren’t free to move even when connected to a cell
Examples of Insulators
Wood Plastic Paper Air Rubber Glass
Examples of Conductors
Copper Iron Steel Gold All conductors are metal
Why do metals conduct electricity
As they have some electrons that are free when we connect metallic objects to a cell its the free electrons that move and form a current. The more free electrons the better conductor.
What is a conventional current
This is when the current flows from the positive side of the cell around the circuit to the negative side.
what is an electron flow/ how is it described
This is when the negative electrons that move around circuit flow from the negative side of a cell around the circuit to the positive side.
Series circuit:
All components are after another in a single loop
Parallel circuit:
Components are in parallel branches with more than one possible loop in the circuit, Currents take path of least resistance
What is current
Current is a measure of how much charge passes a point per second. We group electrons in unit called coulombs
How many electrons are in one Coulomb (C)
6250000000000000
What is electric current
Electric current is how many Coulombs of charge pass a point in one second
What is the electric current equation
Q=IxT
i= current measured in Amps (A)
Q= charge measured in Coulombs (C)
T= time measured in seconds (S)
What is the relation with currents in a circuit
The sum of the current that flows in must equal the sum of the current that flows out.
