The depletion layer in the $p-n$ junction is caused by

In a compound microscope,the focal length of the objective lens is $f_o = 1.2 \ cm$ and the focal length of the eyepiece is $f_e = 3.0 \ cm$. When the object is kept at $u_o = -1.25 \ cm$ in front of the objective,the final image is formed at infinity. The magnifying power of the compound microscope is:

In the following indicator diagram,the net amount of work done will be

Which of the following compounds is non-polar?

When acetaldehyde is reacted with $LiAlH_4$,what is the product formed?

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 $I$.