RH Curl Rule
RH Push Rule
Lenz's Law
WILD !!!
Machines
Energy
Electric Current
100
The magnetic field created by a current carrying wire is always ____________ to the direction of the current.
perpendicular
100
If a coil of wire is attached to a battery, what must be placed next to the coil to move the wire?
Magnet(s)
100
If a magnet is moving toward a coil of wire, an electromagnet will be induced to push the coil ____________ the moving magnet.
away from
100
"B" represents magnetic forces. What are causing these magnetic forces?
electric current
moving charges
100
An electric generator uses the motion of a wire next to a ________ to create ___________.
magnet, electric current
100
The motion of objects that we can see.
Mechanical Kinetic Energy
100
Electric Current is always ( opposite / perpendicular to ) the direction of ( protons / electrons ) motion.
opposite, electrons
200
Charges experience electrostatic forces between each other. What other type of forces is created when charges move?
Magnetic
200
A magnet is placed next to a coil of wire. What else must be happening for the magnet to move the wire?
Current flowing through the wire.
Attach either end of the wires to a battery.
200
If a magnet is moving away from a coil of wire, an electromagnet will be induced to push the coil ____________ the moving magnet.
toward
200
If "I" and the red arrows represent current flowing through this wire, what must "B" and the green loops represent?
Magnetic Field
Magnetic Forces
200
What do we call a device that uses electrical current to create motion?
an electric motor
200
Heat
Thermal Kinetic Energy
or
Thermal Energy
200
A ___________ is always ( opposite / perpendicular to ) the direction of electric current.
magnetic field, perpendicular to
300
What causes electromagnets to form?
Electric Current
300
In what direction will this wire be pushed?
Out of the screen
Toward the viewer
300
The magnet is moved closer to the loop. In what direction is the current flowing on the top of the loop?
away from us
into the screen
300
What must be inside a windmill for the arms (rotated by the wind) to create electricity?
a magnet and a coil of wire
300
In an electric generator, ____________ kinetic energy is converted into ______________ kinetic energy.
mechanical, electrical
300
The motion of electrons all in the same direction at the same time.
Electrical Kinetic Energy
300
Electric Current can be created using batteries. How can we create current without batteries?
moving a magnet perpendicular to a wire
400
What direction is the magnetic field around a wire with current moving away from you?
clockwise around the wire
up left of the wire
to the right above the wire
400
In what direction will this wire be pushed?
to the left
400
What direction is the current flowing on the top of this loop when the loop is moved to the right?
toward you
out of the screen
400
Does a battery generate AC or DC? Explain.
DC
electrons all move from 1 terminal to the other
Only one direction
400
In an electric motor, __________ kinetic energy is converted into ______________ kinetic energy, due to _________ forces.
electric, mechanical, magnetic
400
Batteries
Chemical Potential Energy
or
Electrical Potential Energy
400
An outside force causes a coil to rotate next to a magnet. What happens inside the coil if it starts rotating in the opposite direction?
The current flips direction.
500
A current produces a magnetic field moving toward you above the wire and away from you below the wire? In what direction is this current flowing?
current flowing to the right
500
In which direction is current flowing next to the magnet? The picture to the right is an aerial view.
up (in the picture to the left)
500
A magnet is dropped through a copper tube with its north pole facing down. In what direction are electrons moving on the left side of the copper tube?
away from you
500
This is a picture of a transformer, which converts current in one coil of wire into current in an adjacent coil of wire. Why is the current in the 2 coils different?
The current in the first coil induces a magnetic field, that in tern creates current in the neighboring coil. If they experience the same magnetic field, then more coils = more current.
500
An electric motor uses the magnetic field around a _______________ to create ____________.
current carrying wire, motion
500
Radiant Energy
Light
500
If electrical current is created by moving a magnet perpendicular to a coil of wire, what can be done to increase the amount of electrical current? List at least 3 things.
faster motion
stronger magnetic force
more coils
longer wire perpendicular to the magnetic field