TS EAMCET · Physics · Mechanical Properties of Fluids
A hydrophilic surface is characterised by the contact angle at the water solid interface. The value of contact angle should be
- A \(>90^{\circ}\)
- B \( < 90^{\circ}\)
- C \(=90^{\circ}\)
- D \(=180^{\circ}\)
Answer & Solution
Correct Answer
(B) \( < 90^{\circ}\)
Step-by-step Solution
Detailed explanation
For a hydrophilic surface, the contact angle at the water solid interface is less than \(90^{\circ}\) i.e., \( < 90^{\circ}\). Since, adhesive force between liquid and hydrophilic surface is very high. Hence, the value of contact angle should be less than \(90^{\circ}\).
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