Electric Force
These are the three subatomic particles
A magnet is defined as something that attracts this element.
What is iron?
Electromagnetism was first discovered when Orsted observed this navigational device being affected by electric current.
What is a compass?
An electric motor performs this energy transformation.
What is electric energy to mechanical kinetic energy?
True or False: Charges and poles always occur in pairs.
What is FALSE? Charges are not always paired.
This is the invisible area around a charged particle/object where electric force is exerted on other charged particles/objects.
What is an electric field?
If two opposite poles are pushed apart, this is what happens to their potential energy.
What is potential energy increases?
One of the most useful aspects of electromagnets is that we can do this to them by shutting off their electric current.
What is turn the electromagnet off?
This is the process of generating an electric current from the motion of a conductor through a magnetic field.
What is electromagnetic induction?
This is the name for the spinning loop of conductor in an electric motor or generator.
What is the armature?
Materials that make good conductors are made out of atoms that have loose connections with this subatomic particle.
What are electrons?
This is the name for the colorful interaction between harmful high-energy solar winds and Earth's magnetic field.
What is aurora borealis?
This is the name for a coil of wire with a current running through it.
What is a solenoid?
This is the difference between alternating current and direct current.
What is DC only flows in one direction (battery) and AC is a constantly reversing current?
Name at least one way you can change the physical properties of a conductor that will increase the amount of current it can carry.
1. Make the circuit shorter
2. Make the wire thicker
3. Decrease the temperature
Charges create a current by flowing through a circuit because of differences in this type of energy.
What is potential energy?
Magnetic field lines always go from _________ to _______ poles.
What is north to south?
If an electric current was moving directly away from you, the orientation of the magnetic field surrounding the wire would rotate in this direction.
What is clockwise?
DAILY DOUBLEEEEE!!!!1!!!
Using the image on the board, what direction is the magnetic force felt by the conductor?
These are the three ways that heat can be transferred.
These are the 4 methods in which an object can become charged with static electricity (Name at least 3 to get credit).
What are conduction, friction, induction, and polarization?
This is what happens when a permanent bar magnet is broken in two.
What is the formation of two new smaller permanent bar magnets?
Name at least 3 ways that you can increase the strength of the magnetic field surrounding a solenoid.
What is increasing number of coils, winding the coils closer together, increasing the electric current, or adding a ferromagnetic core?
In a step-down transformer, the primary voltage is 360V and the primary coil has 45 loops. If the secondary coil has 10 loops, then this is the secondary voltage.
What is 80V?
These are the two types of nuclear reactions we studied. Which one creates more energy?
Fission and Fusion. Fusion creates more energy.