The Heisenberg uncertainty principle can be applied to :

The Heisenberg uncertainty principle is not valid for

If the uncertainty in position and momentum of a particle are equal,then what will be the uncertainty in the momentum of the particle?

The uncertainty in position and velocity of a particle in motion are $1 \times 10^{-8} \ m$ and $6.627 \times 10^{-20} \ m/s$,respectively. The mass of the particle is $(h = 6.627 \times 10^{-34} \ J \cdot s)$

The equation $\Delta x \cdot \Delta p \ge \frac{h}{4\pi}$ shows

Assertion $(A)$: The probability of finding an electron in a small volume around a point $(x, y, z)$ at a distance $r$ from the nucleus is proportional to $\psi^2$.
Reason $(R)$: Subatomic particles possess both particle and wave nature.