Choose correct option out of following with increase in n
where T is time period and v is velocity of an electron.

Options

A. T increases and v decreases
B. T and v decreases
C. T decreases and v increases
D. T and v both decrease

Explanation

To solve the problem, we need to analyze how the time period (T) and velocity (v) of an electron change as the principal quantum number (n) increases.

### Step-by-Step Solution:

1. **Understanding the Velocity of an Electron:**
The velocity of an electron in the nth orbit is given by the formula:
\[
v_n = \frac{Z}{n} v_0
...