electricity and magnetism Flashcards
static electricity
A buildup of charges on an object.
electricity
A form of energy caused by the movement of electrons.
current electricity
flow of electricity in and electronic curcuit
conditions for electrons to move along a conductor
must be a complete or unbroken path
Insulator
A material that does not conduct heat well
Conductor
a material that conducts energy or light eg: gold, copper and steal.
circuit
a path for an electrical current to flow around
current
A flow of electric charge.
diff between series circuit and parallel circuit
series - An electric circuit with only one path through which the current is the same
parallel - A circuit that contains more than one path for current flow. becomes net current
charge
a path for an electrical current to flow through
ammeter
A device used to measure current in a circuit
law of conservation of charge
the total electric charge in an isolated system never changes.
amps
what a current is measured in
power
the rate at which work is done
voltage
measures energy carried by electrons
voltmeter
A device used to measure voltage, or electrical potential energy difference
how to calculate power
p= volts x current
Killowatt-hour
measure of electrical energy
how to measure cost of electricity
- multiply devices wattage by hours the appliance is used per day
- divide by 1000
- multiply by kwh rate
eg: 2200Kw hours x 6
= 13,000 Kwh
in the event of an electrical accident…
- turn off the power
- don’t touch the person
- call 111
magnetic field
area of magnetic force around a magnet
magnetic attraction and repolsion
N, S of a magnet are brought together
S,S or N,N of a magnet are distanced
what times of materials are magnetic?
iron, nickel, cobalt and steel
magnet
any material that attracts or contains iron
