An oscillator circuit consists of an inductance of $0.5\,mH$ and a capacitor of $20\,\mu F$. The resonant frequency of the circuit is nearly.....$Hz$

The pairs of straight lines $x^2-3xy+2y^2=0$ and $x^2-3xy+2y^2+x-2=0$ form a

The condition for the coaxial system $x^2+y^2+2\lambda x+c=0$,where $\lambda$ is a parameter and $c$ is a constant,to have distinct limiting points,is

The first terrestrial plants are .......

Under which of the following conditions will a convex mirror of focal length $f$ produce an image that is erect,diminished and virtual?

$A$ complex has a composition corresponding to the formula $CoBr_2Cl \cdot 4NH_3$. What is the structural formula if conductance measurements show two ions per formula unit? Silver nitrate solution gives an immediate precipitate of $AgCl$ but no $AgBr$.