Hysteresis.
Answer:-
The phenomenon by virtue of which intensity of magnetisation lags behind the magnetising field, when a magnetic substance is taken through a complete cycle of magnetisation, is called hysteresis.
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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