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Magnetic Effects of Electric Current and Magnetism
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Magnetic Effects of Electric Current and Magnetism Notes for Class 11 - 12
Ampere's Law
The line integral of the magnetic field in a continuous closed path or loop is µ₀ times the total electric current passed in the region enclosed by the path.
Tesla
When 1 coulomb of charge moves at a velocity of 1 ms-1 perpendicularly to the direction of a magnetic field experiencing 1 N of force, the magnetic of that magnetic field is called 1 tesla (T).
Hall effect and Hall voltage
When an electric conductor is set up perpendicularly at a magnetic field, a potential difference develops perpendicular to both electric current and magnetic field. This is Hall effect and the produced potential difference is called voltage or Hall voltage.
Magnetic Axis
An imaginary line joining the two poles of terrestrial magnet is called magnetic axis.
Magnetic Middle Plain
The imaginary plain perpendicular to the magnetic axis at midpoint is called magnetic middle plain.
Geographical axis
An imaginary line joining the two geographical poles is called geographical axis.
Geographical middle plain
An imaginary perpendicular plain at the midpoint of the geographical axis is called geographical middle plain.
Horizontal component of terrestrial magnetic field
The component of terrestrial magnetic field at any point along the horizontal line is called horizontal component (H) at the particular point of that field.
Hysterisis
From the H-I graph it is observed that intensity of magnetization (I) is always lower than intensity (H). This phenomenon is called hysteresis.
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