Electricity Flashcards
What is an insulator
a substance or device which does not readily conduct electricity.
What type of materials conducts electricity
metals
Why do some materials conduct electricity
conductors have free electrons that can move easily whereas others have electrons that stay tight to atoms
What is an electrical current
a flow of electrons
In which direction does conventional current flow
from the positive to the negative side
What is a series circuit
a circuit with one path for the electrons
In a series circuit the current is the … everywhere
… same …
What is a parallel circuit
the current splits at the junction (s), some going one way, some going another
What do we use to measure current
ammeter
What is the measurement of current called
amps (A), ampere (singular)
What is a complete circuit
an uninterrupted path for electrons to flow from an energy source
What is an incomplete circuit
a circuit that has gaps and no electricity will flow through it.
6A - 2A = 4A
What is the total number of electrons
6A
10A + 9A = 19A
What is the total number of electrons
19A
Why are short circuits dangerous
because without much resistance there is a very high current, this means that a lot of energy can be transferred in a very short time
