Rutherford’s scattering experiment is related to the size of the

Where are the constituent particles located in an end-centered unit cell?

An $n-p-n$ transistor power amplifier in $C-E$ configuration gives

The refracting angle of a prism is $A$ and the refractive index of the material of the prism is $\cot \frac{A}{2}$. The angle of minimum deviation is

The variance of $20$ observations is $5$. If each observation is multiplied by $2$,then the new variance of the resulting observations is:

If $A$ and $B$ are two sets,then $A \times B = B \times A$ if and only if