Q. Potometer works on the principle of :

Q. Potometer works on the principle of :

1. Osmotic pressure
2. Amount of water absorbed equals the amount transpired
3. Root pressure
4. Potential difference between tip of tube and that of plant

Solution :

Correct option : B Potometer is the device used to measure the rate of transpiration. It works on the principle that the amount of water absorbed equals the amount transpired so it measures the amount of water absorbed. So, the correct answer is ‘Amount of water absorbed equals the amount transpired’.