A potential difference of 40,000 V is applied between the filament and the target metal inside X-ray tube. It is found that a current of 1 mA flows in the tube.
(i)How many electrons are hitting the target metal per second ?
(ii)Calculate the amount of energy falling on target metal per second in the form of kinetic energy of the electron .
(iii)What will be the cutoff wavelength of X-rays produced from this tube ?

Explanation

To solve the problem step by step, we will address each part of the question sequentially.

### Given Data:
- Potential difference (V) = 40,000 V
- Current (I) = 1 mA = 1 × 10^(-3) A
- Charge of an electron (e) = 1.6 × 10^(-19) C

### (i) How many electrons are hitting the target metal per second?
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