Electricity Flashcards
How can you charge an object
by friction
by contact
by induction
WHAT DOES Q N E MEAN
q = AMOUNT OF CHARGE (C) N = # OF ELECTRONS LOST (+VE) OR GAINED (-VE) e = 1.60 x 10(to the -19)
What is a electric current?
An electric current is a stream of charged particles, such as electrons or ions, moving through an electrical conductor( ex-copper wire) or space
conventional current
Positive protons moving from the positive terminal to the negative terminal of the source.
Electron flow
the flow of negatively charged electrons from the negative terminal to the positive terminal of the source
Direct current (DC)
2 things on what it is
and give 2 examples
- Is in a fixed single direction
- Doesn’t increase or decrease magnitude
- ex batteries, adapters
Alternating current
2 things on what it is and 2 examples
-Periodically reverses direction in the circuit
-the amount of current varies continuously aka the magnitude of the current varies
ex wall socket and Audio and radio signals carried on electrical wires
what is the law of conservation-current
Electricity is neither created or destroyed in a electric circuit, The electricity is not going to accumulate at any point in circuit
Law of conservation- voltage
As our electrons flow through a circuit, they gain electricity(V) at the same time and lose energy(V) at the loads
The greater the resistance in a circuit the greater the what you are going to need to have the circuit to function
The greater the resistance in a circuit the greater the voltage you are going to need to push the electrons throughout the circuit
The more resistance you have the lower the what?
The more resistance you have the more the current.
how is an electric current produced?
when a charge moves from one place to another
are resistors affected by temp?
yes and they are directly porportional
what is electric potential energy
is the energy required to cause the electrons to push other electrons through loads in circuits
what causes the current to move
voltage
what is electricity
the flow of free electrons
is current proportional to voltage
yes
what is inversely proportional to resistance
current
What does joules over Charge give you J/C
electric potential.. aka voltage
What is another way of saying V=E/Q
1V=1J/1Q or 1V = 1W/1Q
why do electrons move in a circuit, aka why does voltage work
because when they are pushed around electrons repel each other causing movement.
do all conductors have resistance that result in a loss of electric potential energy(J)?
yes
stuff about resistance you should know
hinders electron movement
is affected by temp (directly porportional)
measured with OHMETER
