Insulators/Conductors
What are some examples of insulators?
Plastic, wood, air, rubber, and glass?
In the equation V=IR, what is I measured in?
Amps
What is electricity?
the flow of electrical power or charge
True or False: The electromagnetic force is one of the four fundamental forces of nature.
True
How many pathways are in a series circuit?
One pathway.
What are some examples of conductors?
Metals (especially copper in wires) and skin.
An electric toothbrush operates on 120 V and has a current of 12.5 amps. What is its resistance?
9.6 Ω
Who Discovered Electricity?
Benjamin Franklin
An electromagnet is a magnet that works
-A. only with the help of electricity, B. permanently, C. only when it is made a part of the circuit, OR D. both A & B
A. only with the help of electricity
What are examples of series circuits?
Flashlight, holiday lights
What is an Insulator?
Materials that block the flow of e- through them.
What is the current produced with a 9 V battery through a resistance of 100 ohms?
0.09 amps
Is Electricity Used in the Human Body?
Yes, electricity is required for the nervous system to send signals throughout the body and to the brain.
What will increase the strength of the magnetic field around a current?
-A. Increasing the current, B. moving further from the current, OR C. switching the current off-
A. Increasing the current
What are some examples of parallel circuits?
House, school
What are conductors?
materials that allow e- to flow easily; readily conduct electric charge.
What is the Ohm's Law?
the amount of current is directly proportional to the voltage difference.
How Is Electricity Used?
Lighting, heating, cooling, operating, machinery, etc.
What is electromagnetism?
an interaction that occurs between particles with electric charge via electromagnetic fields.
Do series circuits or parallel circuits have a voltage that stays the same throughout?
Parallel Circuits
Do insulators or conductors have more resistance?
Insulators
The lower the resistance, the higher the ____.
current
What is voltage?
an electromotive force or potential difference expressed in volts.
Which of the following does not increase the strength of the magnetic field produced by an electromagnet?
-A. Increasing the electric current flowing in the coil, B. increasing the number of turns on the coil, OR C. using a copper core-
C. Using a copper core
True or False: More items increases the overall resistance in parallel circuits.
False