1.

A physicalquantity u is given by the relation u=(B^(2))/(2mu_(0)) Here B= magnetic field strength mu_(0)= magnetic permeability of vacuum The name of physical quantity u is

Answer»

ENERGY
energy density
pressure
none of these

Solution :(B) `u=(B^(2))/(2mu)`
Unit of `u=((N//Am)^(2))/(N//A^(2))=(N^(2)A^(2))/(NA^(2))m^(2))=N/(m^(2))=(NM)/(m^(3))=J/(m^(3))`
`=` energy per unit volume =energy density


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