The area of hysteresis loop of a material is equinalent to 250 joule. When 10 kg material is magnetised by an alternating field of 50 Hz then energy lost in one hour will be if the density of material is `7.5 gm//cm^(2)`

What will be the energy loss per hour in the iron core of a transformet if the area of its hysteresis loop isequivalent to 2500erg//cm^(3) . The frequence of alternating current is 50 Hz , The mass of core is 10 kg and the density of iron is 7.5gm//cm^(3) .

A radio active material has a half life of 2.5 hours. In 10 hrs, 1 gm of material is reduced to ..... Gm

A metalrod of length 1.5 m is clamed at the centre. When it is set with longitudinal vibratons it emits a note of 1000 Hz. Determine the Young's modulus if the density of material = 8 xx 10^(3) kg/m^(3)

Breaking stress for a material is 2 xx 10^8 N//m^2 . What maximum length of the wire of this material can be taken t the wire does not break by own weight? Density of material = 5 xx 10^3 kg//m^3

Breaking stress for a material is 2 xx 10^8 N//m^2 . What maximum length of the wire of this material can be taken t the wire does not break by own weight? Density of material = 5 xx 10^3 kg//m^3

The current density in a conductor is 5 A //m^2 when an electric field of 50 V/m is applied across it. Calculate the conductivity of the material.

A rod of cross sectional area 10cm^(2) is placed with its length parallel to a magnetic field of intensity 1000 A//M the flux through the rod is 10^(4) webers. The the permeability of material of rod is

The hysterisis loss of a sample of iron is 300Jm^-3 cycl e^-1 . If density of iron is 7500kg//m^3 and mass of iron piece is 15kg , calculate energy lost/hour when the frequency of magnetisation/demagnetisation used in 50c//s .

The area of cross-section of a railway track is 0.01 m^2 . The temperature variation is 10^@C . Coefficient of linear expansion of material of track is 10^(-5)//^@C . The energy stored per meter in the track is ______ J/m. (Young's modulus of material of track is 10^(11) Nm^(-2) )