The order of the differential equation of the family of all concentric circles centered at $(h, k)$ is

The minimum distance between an object and its real image formed by a convex lens is (in $f$)

If the magnetic dipole moment of an atom of diamagnetic material,paramagnetic material and ferromagnetic material are denoted by $\mu_d$,$\mu_p$ and $\mu_f$ respectively,then

The set $\{x \in R : [x - |x|] = 5\}$ is equal to

If $\overrightarrow{a}=\hat{i}+\hat{j}+\hat{k}$,$\overrightarrow{b}=\hat{i}+\hat{j}$,$\overrightarrow{c}=\hat{i}$ and $(\overrightarrow{a} \times \overrightarrow{b}) \times \overrightarrow{c}=\lambda \overrightarrow{a}+\mu \overrightarrow{b}$,then $\lambda+\mu$ is equal to:

Floridean starch is found in which of the following?