| Electricity | History | Circuits | Conductors and Insulators | Electromagnet |
|---|---|---|---|---|
|
What is the difference between electric field ( E) and electric potential ( V)?
Electric field measures the force a +1 C charge would feel at that location; electric potential measures the work it would take to move a +1 C charge to that position.
|
What is the inventor of the battery's name?
Alessandro Volta
|
Is a circuit open or closed if you haven't turned on the switch?
Open
|
What is a material that lets electric current pass through?
What is a conductor?
|
True or False: An electromagnet is a permanent magnet.
What is False?
|
|
What is the electric field inside a hollow conducting sphere with charge q on its surface? What is the electric potential inside?
Inside a hollow sphere, the electric field is zero. The potential inside the sphere is the same at every point, and equal to the potential on the sphere's surface.
|
What did Edison use as a filament?
A cotton thread soaked in carbon
|
What supplies current to an electrical circuit?
A battery or other electrical source
|
What is a material that blocks an electric current from passing through?
What is an insulator?
|
True or False: An electric crane is an example of an electromagnet.
What is True?
|
|
What is lightning?
A large discharge of static electricity.
|
What happened to the filament Thomas Edison used?
Instead of burning it glowed
|
What part of a circuit does electrical energy change from one form to another?
What is a load?
|
Which of these materials is not a conductor: copper, aluminum, gold, or wood?
What is wood?
|
True or False: A refrigerator magnet is a permanent magnet.
What is True?
|
|
What is the purpose of a fuse?
A fuse is designed to melt if the current becomes too high
|
What did the first electric power plant do?
Carry electricity to people's houses
|
True or False: When you turn on a light, the switch is opening the circuit.
What is False?
|
Which of these materials is a conductor: rubber, glass, air, silver?
What is silver?
|
An electromagnet must be part of an electrical ______.
What is circuit?
|
|
What is the unit of energy?
Power is measured in watts
|
What challenge did Thomas Edison face when trying to invent a practical lightbulb?
Finding a strong material that could be used as a filament
|
An electrical circuit is made up of a connector (wire), a load (lightbulb), a switch, and a...
What is a battery?
|
True or False: Pure water is a conductor.
What is False?
|
An electromagnet is made up of what three items?
What is an iron bar (nail), battery, and a wire?
|
Support Us on Ko-fi