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WorksheetsElectric Currents
Total questions: 25
Worksheet time: 25mins
If the voltage stays the same, but the resistance goes up, the current will....
increase (speed up)
decrease (slow down)
stay the same
To have a complete electric circuit, the path must be _____
small
closed
big
open
An electric current flows _____ unless it is disrupted in some way
continuously
in spurts
unevenly
drop by drop
An electric current is made up of _____ charged electrons
neutral
negative
positive
balanced
Electricity that flows constantly in one direction on a given path.
current electricity
static electricity
electron pathway
conductor
You are setting up a solar panel system for your home and you need a type of current that only flows in one direction for the system to work efficiently. What is this type of current called?
Direct Circuit
Digital Current
Direct Current
Digital Circuit
What happens if you reverse the direction of current in an electromagnet's coil?
The magnetic poles switch places
The electromagnet stops working
The electromagnet becomes a permanent magnet
Nothing changes
How can you make a simple electromagnet at home?
Wrapping a wire around a plastic tube and connecting it to a battery
Placing a magnet in the freezer
Wrapping a wire around an iron nail and connecting it to a battery
Rubbing a needle with silk
What happens to the magnetic field if you increase the current in a wire?
It disappears
It becomes weaker
It stays the same
It becomes stronger
What is the best material to use for the core of an electromagnet?
Plastic
Wood
Iron
Glass
What is the main purpose of an electromagnet in a scrapyard?
To weigh the scrap metal
To attract and move metal objects
To melt the scrap metal
To repel non-metal objects
As current flows through a wire, the number of _____ stays the same
circuits
particles
current
electrons
The unit for the rate of current is the ______________.
ampere
volt
ohm
joule
Current is...
moving protons
moving electrons
measured in volts
measured in ohms
Resistance is...
What "slows down" electrons
What "speeds up" electrons
Moving electrons
What "pushes" electrons
Voltage is simply defined as...
what 'pushes' electrons
what 'stops' electrons
moving electrons
An object through which electrons can easily flow is called a(n) ___________.
Conductor
Insulator
current is measured in....
volts
amps
watts
mph
In the U.S most electrical outlets supply a voltage of....
240 Volts
120 Volts
100 watts
60 amps
Within a circuit, the number of electrons flowing from a power source is _____ the number of _____ returning to the source
much less than, paths
the same as, electrons
much less than, electrons
the same as, paths
The symbol for 1 _____ is A
acceleration
current
ampere
coulomb
A complete, unbroken path that charges can flow through is called an __________________.
conductor
electric circuit
electric current
insulator
Metals such as copper and aluminum are good ______________.
insulators
conductors
circuits
charges
Electric Currents
The flow of electric charge
The resistance to electric flow
The potential difference in a circuit
The power consumed by a device
Electric Currents
Increase the voltage
Decrease the resistance
Increase the length of the wire
Use a thicker wire
