A radio active material is reduced to $$1 / 8$$ of its original amount in 3 days. If $$8 \times 10^{-3} \mathrm{~kg}$$ of the material is left after 5 days the initial amount of the material is

The acceleration due to gravity at height $$h$$ above the earth if $$h << \mathrm{R}$$ (Radius of earth) is given by

The power radiated from a linear antenna of length $$l$$ is proportional to

(Given, $$\lambda=$$ Wavelength of wave):

The equivalent resistance between A and B as shown in figure is: