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प्रश्न
The relative magnetic permeability of a magnetic material is 800. Identify the nature of magnetic material and state its two properties.
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उत्तर
A magnetic material having relative permeability of 800 would be classified as a ferromagnet. A few examples of such materials include iron and nickel.
Its two properties are:
(1) All ferromagnetic materials become paramagnetic when heated to a temperature above the Curie temperature (Tc).
(2) These materials show a strong attraction towards magnetic fields and have a tendency to become magnets themselves.
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संबंधित प्रश्न
A meter gauge train is heading north with speed 54 km/hr in earth's magnetic field 3 x 10-4T. The e.m.f. induced across the axle joining the wheels is ..........
(a) 0.45 mV
(b) 4.5 mV
(c) 45 mV
(d) 450 m V
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