An X-ray tube operated at `40 k V` emits a continous X-ray spectrum with a short wavelength limit `lambda_(min) = 0.310 Å`. Calculate Plank's constant.

Explanation

To calculate Planck's constant using the given information about the X-ray tube, we can follow these steps:

### Step-by-Step Solution:

1. **Identify Given Values**:
- Operating Voltage (V) = 40 kV = \(40 \times 10^3\) V
- Minimum Wavelength (\(\lambda_{min}\)) = 0.310 Å = \(0.310 \times 10^{-10}\) m
- Charge of an Electron (e) = \(1.6 \times 10^{-19}\) C
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