Let $\lambda_{e r} \lambda_p$ and $\lambda_d$ be the wavelengths associated with an electron, a proton and a deuteron, all moving with the same speed. Then the correct relation between them is

Which of the following figures correctly represents the shape of curve of binding energy per nucleon as a function of mass number?

When a $p-n$ junction diode is forward biased

Assertion (A): It is difficult to move a magnet into a coil of large number of turns when the circuit of the coil is closed.

Reason (R): The direction of induced current in a coil with its circuit closed, due to motion of a magnet, is such that it opposes the cause.