Electricity is the movement of ( ) from atom to atom.
electrons
negatively charged particles
protons
postively charged particles
neutrons
protons and electrons
Any object that has an unequal number of positive and negative charges is charged with:
static electricity
electrons
protons
current electricity
neutrons
Static charges are usually temporary because of:
a flow of electrons from the earth
a flow of protons from the earth
a flow of protons from the sky
a flow of electrons from the sky
The unit of measurement of the electric charge on an object:
coulomb
watt
ohm
volt
The electric charge of 6.25E+18 electrons or protons:
coulomb
watt
volt
ohm
kWh
Electrons flow easily through:
most metals
conductors
most nonmetalic substances
insulators
The difference in potential energy between an electron at the negative terminal and one at the positive terminal of a battery:
potential difference
voltage
volt
watt
ohm
coulomb
The complete path through which electricity flows:
circuit
fuse
current
field
When one coulomb of electrons flows through a circuit with a potential difference of **2-100 volts, they do ( ) of work.
**1 joules
1 joule
**2 joules
**1 kWh
**2 kWh
In a parallel circuit:
each device can recieve current by a separate path
if one device opens its path, the other devices continue to function
all devices receive current by a single path
if one device opens its path, the other devices fail to function, too
the current flows in a series through all devices
One coulomb per second:
ampere
volt
watt
ohm
The unit for measuring resistance:
ohm
volt
watt
coulomb
If you connect a 100 volt battery to a device that presents **2-100 ohms resistance, the resulting current will be:
/*100 amperes
*/100 amperes
**100 amperes
*+100 amperes
-*100 amperes
If you connect a device that has 100 ohms resistance to a circuit in which **2-100 amperes is flowing, the required voltage must be:
**100 volts
*/100 volts
/*100 volts
*+100 volts
-*100 volts
If you connect a device to a circuit in which 100 amperes is flowing and the voltage is **2-100 volts, the resistance must be:
*/100 ohms
/*100 ohms
**100 ohms
*+100 ohms
-*100 ohms
Electric power is measured in:
watts
volts
ohms
amperes
current
A current of 10 amperes at **2-100 volts will deliver how much power?
**10 watts
*/10 watts
/*10 watts
*+10 watts
need to know the resistance to calculate power
Electrical energy:
power x time
current x power
voltage x current
current x resistance
voltage x time
If your TV and VCR, together, are rated at 100 watts, what will it cost you to run them 4 hours a day for a year if electricity costs **3-20 cents per kWh?