Question

The uncertainty in the position of an electron is zero, the uncertainty in its momentum be

• A. Zero
• B.
• C.
• D. Infinity

Answer 1

The correct option is D

Infinity

Do you remember Heisenberg Uncertainty Principle.

According to that

$\Delta p$ $\times$ $\Delta x$ $\ge$ $\frac{h}{4\pi }$

Now, as $\Delta x$ = 0

For an electron $\Rightarrow$ $\Delta p$ $\times$ $\Delta n$ $\ge$ $\frac{h}{4\pi }$

Therefore, $\Delta p$ should be indeterminate (infinite).