Describe How Energy Stored in Magnetic Fields
A certain amount of energy is needed to start a current in a circuit – work is done against the back emf to get the…
Mathematics
Explain Self Inductance
A changing current not only induces an emf in a nearby circuit, it also induces an emf in the source circuit. As an example, we…
Explain Mutual Inductance
Since electric currents produce magnetic fields, time-varying currents produce time-varying magnetic fields. Hence, a time-varying current in a circuit will produce a time-varying mag-netic flux…
Explain Electromagnetic Induction and Faraday’s law
English physicist and chemist Michael Faraday (1791-1867) discovered that the emf produced was proportional to the rate of change of magnetic flux through the circuit.…
What is Electro Motive Force
The electro motive force (abbreviation emf, symbol Ɛ, unit V) is what drives a current around a circuit. Examples of sources of emf include batteries,…
Electrodynamics and Conservation Laws: Mathematical Explanation
A magnetic dipole of moment M = mz is located at the origin. A thin circular conducting ring of radius a vibrates such that the…
What is Logarithm?
bc = a, b must be greater than 1 then c = logb (a) We say that c is the logarithm to the base b…
Chemical Equilibrium: Mathematical Solution
Some chemical reactions may have come to an equilibrium, A+2B ≈ 3C+2D At a given temperature this reaction will eventually come to chemical equilibrium, the…
Explain Chemical Equilibrium with Mathematical Example
Some chemical reactions may have come to an equilibrium, A +2B ≈ 3C+2D At a given temperature this reaction will eventually come to equilibrium, the…
Mathematical Example: Concentration of Molecules in Solutions
Chemists routinely need to know and alter the concentrations of solutions in the lab. The concentration of a solute is c mol L-1 and is given…
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