What is Piezoelectric materials ?
Answer:-
Piezoelectric materials are those materials that produce an electric current when they are placed under mechanical stress.e.g crystalline solids(quartz).
angle of contact.
It is defined as the angle between the tangent to the liquid surface at the point of contact and solid surface inside the liquid is called as angle of contact The value of angle of contact depends upon (i) Nature of solid and liquid in contact (ii) Cleanliness of the surface in contact (iii) Medium above the free surface of liquid
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