Where is the National Botanical Research Institute $(NBRI)$ located?

Electric potential at an equatorial point of a small dipole with dipole moment $P$ ($r$,distance from the dipole) is

The angle of elevation of an object from a point $P$ on the level ground is $\alpha$. Moving $d$ metres on the ground towards the object,the angle of elevation is found to be $\beta$. Then the height (in metres) of the object is

In a series $LCR$ circuit,what will be the nature of the circuit for frequencies higher than the resonance frequency?

The products formed when heavy water is reacted with magnesium nitride are:

$A$ tower subtends angles $\alpha, 2 \alpha$ and $3 \alpha$ respectively at points $A, B$ and $C$,all lying on a horizontal line through the foot of the tower. Then $\frac{A B}{B C}$ is equal to: