Biot-Savart law, `dB = K (Idlsin theta)/r^(2)` Write the value of K in SI unit?

Biot - Savart.s law relates current with the magnetic field produced by it.Write the mathematical expression of the above law in vector form.

By connecting three gas laws like Boyle's law, Charles law and Avogadro's law, we get ideal gas equation Universal gas constant R is there in the ideal gas equation. What are the different value of R with units?

The projection of the vector 2i + aj - k on the vector i - 2j + k is (-5)/(sqrt(6)) . Then, the value of a is equal to

If the pH of a saturated aq. solution of Ba(OH)_(2) is 12, the value of its K_(sp) at 298 K is

State Biot savart's law and write its equation.

If the vertex of the parabola y=x^(2)-16x+k lies on x-axis, then the value of k is :

If the point (k,3) (2,k),(-k,3) are collinear, then the values of k are :

If A = [ {:( 2-k, 2), ( 1, 3-k):}] is a singular matrix, then the value of 5k - k ^(2) is equal to