Electromagnetic induction | variation of magnetic flux | Faraday's Laws | Lenz Law | Animation |

Electromagnetic or magnetic induction is the production of an electromotive force across an electrical conductor in a changing magnetic field.

الحث الكهرومغناطيسي | 电磁感应 | इलेक्ट्रोमैग्नेटिक इंडक्शन | 電磁誘導 | Elektromagnetska indukcija | Elektromagnetische Induktion | Ηλεκτρομαγνητική επαγωγή | Induksi elektromagnetik | Induzione elettromagnetica | 전자기 유도 | Indukcja elektromagnetyczna | Электромагнитная индукция | Inducción electromagnética | Induksi éléktromagnétik | Elektromagnetisk induksjon | Indução eletromagnética | Elektromagnetisk induktion | elektromanyetik indüksiyon | Електромагнітна індукція | Електромагнитна индукция | Elektromagnetska indukcija |
electromagnetic induction,faradays laws,lenz law,,magnitude,direction of induced e.m.f,e.m.f,science,faradays law,electromagnetic induction class 12,lenzs law of electromagnetic induction,physics, When a conductor is placed in a magnetic field and current flows in the conductor, the magnetic field and the current interact each other to produce force. The force is called "Electromagnetic force".
Magnetic flux is a measurement of the total magnetic field which passes through a given area. It is a useful tool for helping describe the effects of the magnetic force on something occupying a given area. The measurement of magnetic flux is tied to the particular area chosen. We can choose to make the area any size we want and orient it in any way relative to the magnetic field.
Magnetic flux is the product of the average magnetic field times the perpendicular area that it penetrates. It is a quantity of convenience in the statement of Faraday's Law and in the discussion of objects like transformers and solenoids. In the case of an electric generator where the magnetic field penetrates a rotating coil, the area used in defining the flux is the projection of the coil area onto the plane perpendicular to the magnetic field. Since the SI unit for magnetic field is the Tesla, the unit for magnetic flux would be Tesla m2. This unit combination has the historical name Weber (Wb).
Faraday’s law of induction states that an electromotive force is induced by a change in the magnetic flux.
The magnetic flux (often denoted Φ or ΦB) through a surface is the component of the magnetic field passing through that surface. The magnetic flux through some surface is proportional to the number of field lines passing through that surface. The magnetic flux passing through a surface of vector area A. Where B is the magnitude of the magnetic field (having the unit of Tesla, T), A is the area of the surface, and θ is the angle between the magnetic field lines and the normal (perpendicular) to A.

The current is the same at every point of a series circuit.
The sum of the currents that arrive at a junction is equal to the sum of the
currents that leave it.
A resistor is a conductor whose current-voltage characteristic is a straight line passing through the origin.
A resistor is characterized by its resistance which represents the opposition of the conductor to the flow of electric charges.
The potential difference between the terminals of a resistor is proportional to the current, which traverses it.
The laws of grouping of resistors are R = R1 + R2 + R3 + ... for a grouping in series and 1/R = 1/R 1 + l/R2 + 1/R3 + ... for a parallel one.
A rheostat is a resistor with adjustable resistance that allows for varying the current in a circuit.
A generator converts forms of energy into electric energy.
A generator has two poles: a positive one, and a negative one. The current enters the generator through the negative pole and leaves through the positive pole.
A generator is characterized by its electromotive force E and its internal resistance r.
The characteristic of a generator is a straight line of negative slope.
Ohm's law for a generator is expressed as: U = -rl + E
An ideal generator does not have an internal resistance.
A receiver converts electric energy to a form of energy other than thermal.
A receiver is characterized by its 'back-electromotive force e and its internal resistance r.
The characteristic of a receiver is a straight line of positive slope.
Ohm's law for a receiver is expressed as: V = rI + e.
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Physics Grade 10 | Visual exploration | By Nidal Alam |