Category

# Electric Current

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### Ohm's Law

Wolfram Research

The current through a conductor between two points is directly proportional to the voltage across the two points. It is inversely proportional to the resistance across those two points.

### Circular Current Loop

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A circular current loop is a current constrained along a circular path by an infinitely thin wire.

### Electrical Energy

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Electrical energy is the energy newly derived from electric potential energy or kinetic energy.

### Electric Power Using Resistance and Current

Wolfram Research

Electric power is the rate, per unit time, at which electrical energy is transferred by an electric circuit.

### Electric Power Using Voltage and Current

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Electric power is the rate, per unit time, at which electrical energy is transferred by an electric circuit.

### Helmholtz Coil Field at Center

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A Helmholtz coil is a device for producing a region of nearly uniform magnetic field. It consists of two solenoid electromagnets on the same axis.

### Helmholtz Coil Field at Arbitrary Distance

Wolfram Research

A Helmholtz coil is a device for producing a region of nearly uniform magnetic field. It consists of two solenoid electromagnets on the same axis.

### Ideal Transformer Current Equation

Wolfram Research

A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction. A varying current in one coil of the transformer produces a varying magnetic field...

### Inductor-Stored Energy

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Inductor-stored energy is the energy stored in an inductor, a passive two-terminal electrical component that stores electrical energy in a magnetic field when electric current is flowing through it.

### Infinitely Long Wire Magnetic Field

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A magnetic field is the magnetic effect of electric currents and magnetic materials for an infinitely long wire; it is created by the current flowing through the wire.

### Joule's Law Using Electric Current

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Joule's first law states that the power of heating generated by an electrical conductor is proportional to the product of its resistance and the square of the current.

### Lorentz Force Using Current

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The Lorentz force is the combination of electric and magnetic force on a point charge due to electromagnetic fields.

### Magnetic Field in an Infinitely Long Solenoid

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A solenoid is a coil wound into a tightly packed helix.

### Maximal Magnetic Induction in a Circular Coil

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Magnetic induction is the production of an electromotive force across an electrical conductor due to its dynamic interaction with a magnetic field.

### Parallel Resistor-Inductor Circuit

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A resistor–inductor circuit is an electric circuit composed of resistors and inductors driven by a voltage or current source. The parallel version places resistor and inductor in parallel.

### Parallel Resistor Capacitor Circuit

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A resistor–inductor circuit is an electric circuit composed of resistors and capacitors driven by a voltage or current source. The parallel version places resistor and capacitor in parallel.

### Power Factor Using Voltage

Wolfram Research

The power factor of an AC electrical power system is defined as the ratio of the real power flowing to the load to the apparent power in the circuit.

### Two Infinitely Long Parallel Wires

Wolfram Research

Currents passing through two infinitely long parallel wires create a magnetic force between the two.