A) \[{{\Psi }_{w}}={{\Psi }_{m}}+{{\Psi }_{s}}+{{\Psi }_{p}}\]
B) \[{{\Psi }_{w}}={{\Psi }_{m}}-{{\Psi }_{s}}-{{\Psi }_{p}}\]
C) \[{{\Psi }_{w}}={{\Psi }_{m}}-{{\Psi }_{s}}+{{\Psi }_{p}}\]
D) \[{{\Psi }_{w}}={{\Psi }_{m}}+{{\Psi }_{s}}-{{\Psi }_{p}}\]
Correct Answer: A
Solution :
The difference between the free energy of water molecule in pure water and the energy of water in any other system is termed as water potential. Movement of water occurs from region of higher water potential to lower water potential. \[{{\psi }_{w}}={{\psi }_{s}}+{{\psi }_{m}}+{{\psi }_{p}}\] Where, \[{{\psi }_{w}} =\,\,Water potential\] \[{{\psi }_{m}} =\,\,Metric\,\,potential\] \[{{\psi }_{s}} =\,\,Solute\,\,potential\] \[{{\psi }_{p}} =\,\,\operatorname{Pressure}\,\,potential\]
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