Current Flashcards
All matter is made up of minute particles called …
Atoms
Atoms vary in …, …, … and … depends if on the chemical element to which they belong
Size, weight, structure and complexity
Atoms have a central core called a …
Nucleus
Negatively charged … called … travel round the nucleus
Particles
Electrons
The nucleus of all atoms contains particles called …
The … are positively …
Protons
Charged
The electrons are held in orbit by a
Force of attraction
The centrifugal force of orbit is equal to the … … …
Force of attraction
In a balanced atom, the number of protons in the nucleus and the number of electrons in orbit are …
Equal
The outer most orbit is knows as the … …
Valence shell
The electron in this outer orbit is known as the … …
Valence electron
The greater the distance between the nucleus and the orbiting electrons the bond will be … between them
Weaker
What are electrons called when they are forced out of orbit?
Free electrons
The movement of the free electrons create a?
Electrical current
What are materials called that require very little energy to force electrons out of orbit and enable current to flow?
Conductors
In some materials the bond between nucleus and electrons is much stronger and the electrons are not so easily dislodged?
Insulators
When an electron is forced out of orbit what happens to the atom?
Becomes positively charged
(Positive ion)
An ion is a atom that has either a … or … of electrons
Surplus
Deficiency
All negative electrons are attracted to… …
Positive charges
All negative electrons are replied by … …
Negative charges
A example of one method of achieving this flow is the … … within a battery
Electric cell
The initial action within the electric cell is NOT electron flow but the result of a … …
chemical Action
The battery cell consists of a .. in which … plates of different … are suspended
Container
Two
Metals
The liquid in the battery cell is called the …
Electrolyte
During the chemical reaction in the battery cell the action courses one plate to lose electrons and become … … whilst the other plate gains electrons and becomes … …
Positively charged
Negatively charged
The flow of electricity is called the … …
Which is the movement of … … move through along a …
Electric current
Free electrons
Conductor
ELECTRON FLOW is always … to …
Negative
Positive
When electricity was thought to flow from positive to negative, it is now known as … … …
Conventional current flow
The unit of measurement of current is the ampere which is written as a capital …
A
Amps is the amount of … passing at a given point in one second.
Electrons
The effects of current flow are to cause … and set up a … … round a conductor
Heat
Magnetic field
The circuit symbol for current is?
I
