Farady laws of electromagnetic induction
Michal farady was an english physicist who formulated two laws in 1931 on the basic of experiments. Farady noticed that when he moved a permanent magnet in or out of a coil it induced an electromotive force.
These basics laws of electromagnetism called farady law of electromagnet induction.
There are two laws was formulated by sir michal farady.
1. first law- According to first laws of electromagnet induction whenever a condutor is placed in a moving magnetic field an emf is induced which is known as induced emf.
In other words, whenever a conductor is rotated in magnetic field an emf is induced known as induced emf.
2. Second law- It states that the magnitude of induced emf in the coil is equal to rate ofchange of flux that linkage with the coil.
In other words, a voltage is induced in a circuit whenever relation motion exits between a conductor and a magnetic field and that the magnitude of this voltage is proportional to the rate of change of flux.
let us assume that magnet is stationary and only coil is moved towards or away from the magnet the galvenometer deflected. When the coil is stationary and magnet moves towards or away, then needle of galvenometer also move. It is sign of emf induced in coil.
In simple words there are four method to change magnetic field.
1. by moving a magnet towards or away from the coil.
2. by moving the coil into or out of the magnetic field.
3. by changing the area of a coil placed in a magnetic field.
4. by rotating the coil relative to magnetic field.
Position of magnet deflection in galvenometer
1. magnet at rest = no deflection
2. magnet moves toward the coil= deflection in galvenometer in one direction
3. fixed magnet near the coil = no deflection
4. magnet moves away= opposite deflection
These basics laws of electromagnetism called farady law of electromagnet induction.
There are two laws was formulated by sir michal farady.
1. first law- According to first laws of electromagnet induction whenever a condutor is placed in a moving magnetic field an emf is induced which is known as induced emf.
In other words, whenever a conductor is rotated in magnetic field an emf is induced known as induced emf.
2. Second law- It states that the magnitude of induced emf in the coil is equal to rate ofchange of flux that linkage with the coil.
In other words, a voltage is induced in a circuit whenever relation motion exits between a conductor and a magnetic field and that the magnitude of this voltage is proportional to the rate of change of flux.
Explanation of farady law
let us assume that magnet is stationary and only coil is moved towards or away from the magnet the galvenometer deflected. When the coil is stationary and magnet moves towards or away, then needle of galvenometer also move. It is sign of emf induced in coil.
In simple words there are four method to change magnetic field.
1. by moving a magnet towards or away from the coil.
2. by moving the coil into or out of the magnetic field.
3. by changing the area of a coil placed in a magnetic field.
4. by rotating the coil relative to magnetic field.
Position of magnet deflection in galvenometer
1. magnet at rest = no deflection
2. magnet moves toward the coil= deflection in galvenometer in one direction
3. fixed magnet near the coil = no deflection
4. magnet moves away= opposite deflection
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