forward current transfer ratio.
Forward current transfer ratio (α) for common base operation is defined as the ratio between change in collector current to the change in emitter current keeping collector base voltage constant.
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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