energy and change Flashcards
(22 cards)
what is current electricity
current electricity is the flow of charge
what is required for current to flow
closed circuit, conducts, a source of electrical energy
what are the reasons for an incomplete circuit
open switch, a loose contact at the switch, a loose connection, a broken wire, a broken filament in the bulb
what is a resistor
a resistor is a circuit component that offers resistance against the flow of charge
heating effect
Heat is produced when an electric current flows through a conductor. This is referred to as the heating effect of electric current.
magnetic effect
a current carrying conductor causes a magnetic field around the conductor This can be used for an electrical current to be used when making temporary electromagnets
chemical effect
is the process of an electrical current going through a conducting solution
what is an anode
the positively charged electrode by which the electrons leave an electrical device.
what is a cathode
A cathode is the negatively charged electrode by which electrons enter an electrical device.
what are the effects of electrical current
heating, chemical, and magnetic effects
applications of heating effect
heater, stove, light bulbs, kettles, etc.
application of the magnetic effect
electromagnets, speakers, electric drill, etc.
unit of charge
1c = 6,25*10/18
battery
a combination of more than one cell that is connected in series
resistor
a circuit component that resists the flow of charge
the energy conversion in cells and batteries is
chemical energy - electrical energy
a fuse
is a safety device to prevent risks of using electricity
mass is measured in
grams(g) or kilograms
units for volume of materials
cubic meter cubic centimeter cubic millimeter
density
mass over volume mass per unit volume
denisty is expressed in
g.cm -3
density
mass per unit volume
