electro-technology Flashcards
What would happen is a electron were to be removed?
the atom would be a positive
What would happen if a electron were to be gained?
the atom would be negative
What would surround a electric charge?
a electric field
What happens to like charges?
they would repel
What would happen to non-like charges?
they would attract
What is the formula of electric current?
- I=Q/t (current=charge/time)
- its also how to measure current
In a circuit what would happen to the electrons?
the electrons would go from the anode(negative) to the cathode(positive), which is called ‘electron flow’
What do we call the circuit if the current goes the other way?
- conventional current
- it doesn’t matter what way it goes both works the same
What is the difference between conventional and electron flow?
- conventional goes from positive to negative terminal
- electron goes from negative to positive terminal
If an atom has one electron or loosely-held one on the outer ring, what does that make the material?
it makes it a good insultor
If an atom has many electrons on the outer ring, what does that make the material?
it makes it a good insulator
What do conductors derive from?
metals
What do insulators derive from?
non-metals such as:
- plastics
- woods
- glass
are generally insulators
What is needed for current to flow?
- a energy source (EMF)
- a load (a lamp for example)
- a means of transmitting (conductor)
What are the two types of electric flow?
- DC (direct current)
- AC (alternate current)
