electricity Flashcards
what is electricity?
what is static electricity? how does this form?
form of kinetic energy, movement of electrons
static electricity is a buildup of electrons in one place formed by friction a result of an imbalance of negative and positive charges.
example: when a person collects extra electrons from ballon, it will zap (static electricity) to get rid of extra electrons.
what is electronegativity?
what is grounding?
a chemical property the describes how likely an object is to attract or steal electrons
increases across a period, increases up a group
grounding is when an object is connected to the earth (ground) through a connecting wire.
example: if a person touches exposed wires, they ground the wires making it electrocute them as the electricity travels through them to the ground.
what is a series circuit?
what is a parallel circuit? what are the paths the current flows though called? how do you figure out the sum of a current?
series: all components are connected end to end in a single path there is only 1 path for the current to flow.
parallel: all components are connected but there are many paths for the current flow. these paths are known as branches.
current equals the sum of each individual branches current
what do all circuits consist of?
a power supply to provide electrically energy
load in which the electrical energy is converted into other useful forms of energy
what is a power supplies job?
what are some types of power supplies? define them.
to supply electrons and push them through a wire.
battery: is called a cell, when chemical energy turns into electrical energy.
generators: pushes electrons around.
solar panel: takes light from sun and converts it to energy.
what is the unit of current?
what is the unit of resistance?
what is voltage?
current: amperes or Amps
resistance: Ohms
the voltage of an entire circuit is the amount of energy provided by the power supply to push electrons around
what does it mean if the resistance is high?
what are resistors?
harder for the electrons to flow through the circuit
usually, the resistance of connecting wires in an electrical circuit is so low that we can assume its zero
resistors are components with high resistance designed to lower the current flowing though the circuit.
what is the Ohm’s Law?
what is amplitude?
V = IR
voltage = v
resistance (Ohm’s) = R
current (Amp’s) = I
how many electrons are flowing though a point at any given time
