If the imaginary part of $\frac{2z+1}{iz+1}$ is $-2$,then the locus of the point representing $z$ in the Argand plane is

In a $\triangle ABC$,$a^2 \sin 2C + c^2 \sin 2A$ is equal to (in $Delta$)

In a step-up transformer, the turn ratio is $1:2$. A Leclanche cell $(e.m.f. 1.5\,V)$ is connected across the primary. The voltage developed in the secondary would be.......$V$

Which of the following statements regarding cyanobacteria is incorrect?

Which of the following is not a class of Bryophytes?

Let $u = i + j$,$v = i - j$ and $w = i + 2j + 3k$. If $n$ is a unit vector such that $u \cdot n = 0$ and $v \cdot n = 0$,then $|w \cdot n|$ is equal to