column 1
What do two negatively charged particles do when they get close to each other ?
They repel each other
Name two examples of electrical insulators [material not object]
rubber, glass, plastic, dry wood, ceramic, porcelain, mica, oil, dry cotton, and diamond
What is the definition of the word "electrical current"
Electrical current is the rate of flow of electric charge
Complete the sentence:
As electrons flow through a circuit, they lose ________.
As electrons flow through a circuit, they lose energy.
When connecting a voltmeter, it is always connected in ____________________ .
When connecting a voltmeter, it is always connected in parallel.
What is an elctrical insulator ?
something that does not allow electrical current to flow through it
Why do metals make such good conductors ?
Metals have many free electrons that can move between atoms.
What type of current is used for long-distance power grid transmission ?
alternating current AC
In what kind of circuit is the current is the same at any point in the circuit ?
series curcuit
What is the equation for calculating resistance ?
R = V/I R = V÷I
What is the unit of measure for current ? i
ampere
How is an ammeter connected to a circuit ?
An ammeter is always connected in series.
What is the symbol for "ampere" ?
A
In what units is potential difference measured ?
volts
What is the equation for electrical power ?
power = current x voltage
What is the symbol for volts ?
V
What type of current is used for electronic devices, batteries, and solar panels.
direct current DC
What is voltage ?
A measure of potential energy is given to each electron.
In a series circuit, what happens when you add more lamps ?
Each lamp will glow dimmer. [be less bright]
What are the units for electrical energy ?
joules [J]
What type of electrical property do insulators have ?
high resistamce
What electrical property do metals have ?
very low resistance
What is another word for "voltage" ?
electromotive force
potential difference
If the individual potential differences across each of the components are added together, what does it equal ?
If the individual potential differences across each of the components are added together, it equals the potential difference across the cell or battery.
what are the units for power ?
watts