physics unit test Flashcards
electricity definition:
is a form of energy resulting from charged particles
static electricity definition:
is the accumulation of electric charge on an object.
which subatomic particle in the atom is responsible for creating static charges on an object?
electron
if the number of electrons is equal to the number of protons, what is the overall charge on the object?
neutral
if an object is has less electrons than protons what is the overall charge?
positive
if an object has more electrons than protons then the overall charge is?
negative
Conductor definition
Is an object or material that allows Electric charge to flow easily
Insulator Definition
a material that resists the flow of electric charge
electroscope function
detects the presence and magnitude of electric charge
two types of electroscopes
leaf electroscope, pith ball electroscope
what happens to the leaves of an electroscope when charged?
they repel
three methods of charging
friction, conduction, induction
subjects closer to the top lose electrons and have a ___ charge.
positive
subjects closer to the bottom will gain electrons and have a __ charge
negative
grounding definition
It’s the process of connecting an electrical system to the earth
How does a lightning rod protect a home during a thunderstorm
Provides a safe path for lightning to reach the ground
Identify 2 uses of static electricity in our lives.
photocopier
electrostatic pro
four main components of an electric circuit?
source
conductor
load
switch
open circuit:
stops electrical flow
closed circuit
allows electrical flow to continue
voltage symbol
V
current symbol
I
resistance symbol
R
voltage unit
volts
