Introduction to Electromagnetic Fields A G Inc. Click within the blue frame to access the control panel. Only use the control panel (at the bottom of screen) to review what you have seen. This presentation is partially animated. When using your mouse, make sure you click only when it is within the blue frame that surrounds each slide.
Using force fields to store energy Any type of force field can be used to store energy The gravitational force field is an example we can use for analogous thinking. A not so good R. Goldberg machine will serve as a good quick example of using the gravitation field to store energy. It will be useful as an analogy to the electromagnetic field. It will useful as an analogy to how any other field stores energy.
Using force fields to store energy So, I will pick up the purple block (follow a gravitational field line (not shown in this cartoon) but in the opposite direction of falling) and put the purple block on the tall table. The idea is to have the energy stored so that the green object can be raised to the table any time I want!! I know that; the gravitational force lines are parallel to the floor and parallel to each other as we look up from the floor. An object will move across these force lines if it can. (It will fall to the floor)
Using force fields to store energy So, I will pick up the purple block (follow a gravitational field line (not shown in this cartoon) but in the opposite direction of falling) and put the purple block on the tall table. The idea is to have the energy stored so that the green object can be raised to the table any time I want!! I know that; the gravitational force lines are parallel to the floor and parallel to each other as we look up from the floor. An object will move across these force lines if it can. (It will fall to the floor)
Using force fields to store energy I have now stored the energy I need. If I push the purple block off of the table it will: cross the force lines this time heading for the floor; end up in the bucket; and cause the green block to rise up to the other table. The idea is to have the energy stored so that the green object can be raised to the table any time I want!! I know that; the gravitational force lines are parallel to the floor and parallel to each other as we look up from the floor. An object will move across these force lines if it can. (It will fall to the floor)
Using force fields to store energy Summary: Like other great thinkers, R. Goldberg understood that: (1) An object that has mass will move one way or the other through the gravitation field. (It will cross force lines) (a)If the object moves one way (up) energy is stored in the object. (b) If the object moves the other way, (down) the stored energy is released. Energy added to object. Energy released from object. Gravity force lines (2) An object that has mass and moves along a gravitation force line does not gain or lose energy relative to that gravitational field. (It is not following a field line)
Attributes of electromagnetic force A view of a portion of two separate conductors (copper wires) in two independent circuits with current flowing through each. A non-magnetic conductor in circuit #1 A non-magnetic conductor in circuit #2 When current is made to flow on these two separate wires, the wires will want to move closer to or farther away from each other depending on the direction the current flows in each wire. There is no physical contact between these two wires. Electromagnetic force attribute list (1) It will make conductors move.
Attributes of electromagnetic force A non-magnetic conductor in circuit #1 A non-magnetic conductor in circuit #2 Imagine: current flowing in each of these conductors. A sprinkle of iron filings falling from above. A cardboard plane to keep the wires from moving. Electromagnetic force attribute list (1) It will make conductors move.
Attributes of electromagnetic force A non-magnetic conductor in circuit #1 A non-magnetic conductor in circuit #2 Imagine: current flowing in each of these conductors. A sprinkle of iron filings falling from above. Electromagnetic force attribute list (1) It will make conductors move.
Attributes of electromagnetic force A non-magnetic conductor in circuit #2 Imagine: current flowing in each of these conductors. A sprinkle of iron filings falling from above. A non-magnetic conductor in circuit #1 Electromagnetic force attribute list (1) It will make conductors move. (The top view looking down the wires toward the cardboard plane.)
Electromagnetic force attribute list (1) It will make conductors move. Attributes of electromagnetic force Imagine: current flowing in each of these conductors. A sprinkle of iron filings falling from above. (Side view of iron filing arranging themselves onto the cardboard.) The iron filings arranged themselves on the cardboard as sets of circles around each current carrying conductor. (2) It will make a magnetic field around the wires. (The top view looking down the wires toward the cardboard plane.)
Attributes of electromagnetic force A non-magnetic conductor in circuit #1 A non-magnetic conductor in circuit #2 Imagine: Electromagnetic force attribute list current flowing in each of these conductors. A sprinkle of iron filings falling from above. A sprinkle of mica filings falling from above. (1) It will make conductors move. (2) It will make a magnetic field around the wires.
Electromagnetic force attribute list (1) It will make conductors move. (2) It will make a magnetic field around the wires. Attributes of electromagnetic force Imagine: current flowing in each of these conductors. A sprinkle of iron filings falling from above. A sprinkle of mica filings falling from above. (The top view looking down the wires toward the cardboard plane.)
Electromagnetic force attribute list (1) It will make conductors move. (2) It will make a magnetic field around the wires. Attributes of electromagnetic force Imagine: current flowing in each of these conductors. A sprinkle of iron filings falling from above. Mica (KAl 3 Si 3 O 10 (OH) 2 A sprinkle of mica filings falling from above. can be ground to a very fine power (floats in air). is a ceramic (mineral, clay). is not affected by a magnetic field. is affected by a electric field. (3) It will make an electrostatic field around the wires. Electric field arrangement of Mica. Magnetic field arrangement of Iron (The top view looking down the wires toward the cardboard plane.)
Photo superposition of the two force fields Electromagnetic force attribute list Attributes of electromagnetic force Electromagnetic force attribute list (1) It will make conductors move. (2) It will make a magnetic field around the wires. (3) It will make an electrostatic field around the wires. Drawing (as generated by a mathematical model) for the electromagnetic field shown in the superposition photograph.
Photo superposition of the two force fields Electromagnetic force attribute list Attributes of electromagnetic force Electromagnetic force attribute list (1) It will make conductors move. (2) It will make magnetic field lines around the wires. (3) It will make electrostatic field lines around the wires. Drawing (as generated by a mathematical model) for the electromagnetic field shown in the superposition photograph.
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