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# Electric Potential

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### Differential Amplifier

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A differential amplifier is a type of electronic amplifier that amplifies the difference between two input voltages, but suppresses any voltage common to the two inputs.

### Ohm's Law

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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.

### Capacitor Energy Using Capacitance and Voltage

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The energy stored in a capacitor depends on the charge and voltage difference across the capacitor.

### Capacitor Energy Using Charge and Voltage

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The energy stored in a capacitor depends on the charge and voltage difference across the capacitor.

### Capacitance

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Capacitance is the ability of a body to store an electric charge, and equals the charge required to cause unit potential difference in a conductor.

### Electric Field of Solid Charged Sphere

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The electric field of a solid charged sphere describes a vector field that associates to each point in space the Coulomb force that would be experienced per unit of electric charge, by an infinitesimal test charge at ...

### Electric Field of Hollow Charged Sphere

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The electric field of a hollow charged sphere describes a vector field that associates to each point in space the Coulomb force that would be experienced per unit of electric charge, by an infinitesimal test charge at...

### Electrical Energy

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

### Electric Field of a Point Charge

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A point charge is an idealized model of a particle that has an electric charge. A point charge is an electric charge at a mathematical point with no dimensions.

### Electric Power Using Resistance and Voltage

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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.

### Ideal Transformer Voltage Equation

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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...

### Instrumentation Amplifier

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An instrumentation amplifier is a type of differential amplifier that has been outfitted with input buffer amplifiers, which eliminate the need for input impedance matching, and thus make the amplifier particularly su...

### Inverting Amplifier

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An inverting amplifier is an operational amplifier where the output voltage changes in an opposite direction to the input voltage. An operational amplifier (often op-amp or opamp) is a DC-coupled, high-gain electronic...

### Johnson–Nyquist Noise Voltage

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The Johnson–Nyquist noise is the electronic noise generated by the thermal agitation of the charge carriers (usually the electrons) inside an electrical conductor at equilibrium, which happens regardless of any applie...

### Joule's Law Using Electric Potential

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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 Number

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The Lorentz number is a dimensionless number that relates the thermal conductivity of a metal to its temperature and its electrical conductivity.

### Nernst Equation Using Reaction Quotient

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The Nernst equation is an equation that relates the reduction potential of an electrochemical reaction (half-cell or full-cell reaction) to the standard electrode potential, temperature and activities (often approxima...

### Nernst Equation Using Equilibrium Constant

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The Nernst equation is an equation that relates the reduction potential of an electrochemical reaction (half-cell or full-cell reaction) to the standard electrode potential, temperature and activities (often approxima...

### Noninverting Amplifier

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A noninverting amplifier is an operational amplifier where the output voltage changes in the same direction as the input voltage. An operational amplifier (often op-amp or opamp) is a DC-coupled, high-gain electronic ...

### 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.

### Paschen's Law

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Paschen's law is an equation that gives the breakdown voltage—that is, the voltage necessary to start a discharge or electric arc between two electrodes in a gas as a function of pressure and gap length.

### Power Factor Using Voltage

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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.

### Transformer Universal EMF Using Flux Density

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A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction. Electromotive force, also called EMF, is the voltage developed by any source of el...

### Transformer Universal EMF Using Magnetic Flux

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A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction. Electromotive force, also called EMF, is the voltage developed by any source of el...