Which of the following is an example of an unsaturated fatty acid?

If a wire of length $L$ forms a loop of radius $R$ and has $n$ turns,find the magnetic field at the centre of the loop if the current flowing in the loop is $I$.

The centroid of the triangle formed by the pair of straight lines $12x^2 - 20xy + 7y^2 = 0$ and the line $2x - 3y + 4 = 0$ is:

Two circular coils can be arranged in any of the three situations shown in the figure. Their mutual inductance will be

An electron in an excited state of $Li^{2+}$ ion has angular momentum $3h/2\pi$. The de Broglie wavelength of the electron in this state is $p\pi a_0$ (where $a_0$ is the Bohr radius). The value of $p$ is

If a complex number $z$ satisfies $|z^2-1|=|z|^2+1$,then $z$ lies on