Question:
Coersivity of a magnet where the ferromagnet gets completely demagnetized is $3 \times 10^3 Am^{?
Coersivity of a magnet where the ferromagnet gets completely demagnetized is $3 \times 10^3 Am^{?
Updated On: Jun 23, 2023
- 3 A
- 30 mA
- 6 A
- 60 mA
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The Correct Option is A
Solution and Explanation
$H=nl \, \therefore\, I=\frac{H}{n}=\frac{3\times10^{3}}{1000}=3A$
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Concepts Used:
Magnetism & Matter
Magnets are used in many devices like electric bells, telephones, radio, loudspeakers, motors, fans, screwdrivers, lifting heavy iron loads, super-fast trains, especially in foreign countries, refrigerators, etc.
Magnetite is the world’s first magnet. This is also called a natural magnet. Though magnets occur naturally, we can also impart magnetic properties to a substance. It would be an artificial magnet in that case.
Read More: Magnetism and Matter
Some of the properties of the magnetic field lines are:
- The lines and continuous and outside the magnet, the field lines originate from the North pole and terminate at the South pole
- They form closed loops traversing inside the magnet.
- But here the lines seem to originate from the South pole and terminate at the North pole to form closed loops.
- More number of close lines indicate a stronger magnetic field
- The lines do not intersect each other
- The tangent drawn at the field line gives the direction of the field at that point.