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hyperphysics

Electric Conductor

In a conductor, electric current can flow freely, in an insulator it can not.

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DC Electric Power

The electric power in watts represents the rate at which energy is converted from the electrical energy of the moving charges to some other form

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Electric Fields

A series of definitions relating to electric fields.

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Electric charge

A basic but clear explanation of electric charge.

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Electric Arc

The phenomena of an electric arc is when electricity travels from one object to another object through the air.

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hyperphysics

Lorentz Force Law

Both the electric field and magnetic field can be defined from the Lorentz force law. The electric force is straightforward, being in the direction of the electric field if the charge q is positive, ...

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Current Law

The electric current in amperes which flows into any junction in an electric circuit is equal to the current which flows out. This can be seen to be just a statement of conservation of charge.

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How can a helicopter fly up the sky?

A simple non-mathematical description of how a helicopter flies and why a tail motor is required to keep it from spinning.

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Optical tweezers simulation

Did you ever imagine that you can use light to move a microscopic plastic bead? Use the optical tweezers to manipulate a single strand of DNA and explore the physics of tiny molecular motors.

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Electric Force Fields

This site discusses the concepts of electric force fields and lines of force.

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