Number of waves formed by a Bohr electron in one complete revolution in its third orbit is

If the radius of the first Bohr orbit of a hydrogen atom is $a_0$, what will be the de Broglie wavelength of an electron in its third excited state (in $\pi a_0$)?

The minimum de-Broglie wavelength is associated with which of the following?

According to the wave-particle duality of matter by de-Broglie,which of the following graph plots presents the most appropriate relationship between the wavelength of an electron $(\lambda)$ and the momentum of an electron $(p)$?

The de-Broglie wavelength of a particle of mass $6.63 \ g$ moving with a velocity of $100 \ ms^{-1}$ is

If the kinetic energy of an electron is increased by $4$ times,what will be the change in its associated de Broglie wavelength?