In a reflecting telescope, a secondary mirror is used to:

Certain galvanometers have a fixed core made of non magnetic metallic material. The function of this metallic material is

Given below are two statements:

Statement I: If $$\mathrm{E}$$ be the total energy of a satellite moving around the earth, then its potential energy will be $$\frac{E}{2}$$.

Statement II: The kinetic energy of a satellite revolving in an orbit is equal to the half the magnitude of total energy $$\mathrm{E}$$.

In the light of the above statements, choose the most appropriate answer from the options given below

Dimension of $$\frac{1}{\mu_{0} \in_{0}}$$ should be equal to