Frequently asked questions and answers of Surface Tesnion Experiment in Optics of Physics to enhance your skills, knowledge on the selected topic. We have compiled the best Surface Tesnion Experiment Interview question and answer, trivia quiz, mcq questions, viva question, quizzes to prepare. Download Surface Tesnion Experiment FAQs in PDF form online for academic course, jobs preparations and for certification exams .
Intervew Quizz is an online portal with frequently asked interview, viva and trivia questions and answers on various subjects, topics of kids, school, engineering students, medical aspirants, business management academics and software professionals.
Question-1. Define surface tension?
Answer-1: The tangential cohesive force acting along the unit length of the surface of a liquid.
T = F / L
Where, F = total force along a line
L = length of the line
Question-2. What are units of surface tension in C.G.S. and S.I. (M.K.S.) system?
Answer-2: Dynes / cm (C.G.S.) and Newton / meter (M.K.S.)
Question-3. What are cohesion and adhesion force?
Answer-3: Cohesion force is the attractive force between like molecules, whereas, the adhesion is the attractive force between unlike molecules, e.g. attraction between glass slide and the liquid.
Question-4. What are the factors affecting the surface tension?
Answer-4: Factors affecting the surface tension are:
(a) Nature of liquid
(b) Nature of the surface in contact
Question-5. What is the effect of temperature on the surface tension?
Answer-5: Surface tension decreases with the rise of temperature.
Question-6. Define critical temperature?
Answer-6: The temperature at which the surface tension is zero.
Question-7. Why the free surface of water is concave but that of mercury is convex?
Answer-7: The free surface of water is concave because Cohesion force between water molecules >> adhesion force between water and gas molecules. Because the free surface of mercury is convex because Cohesion force >> adhesion force.
Question-8. What is the shape of free surface at critical temperature?
Answer-8: The surface tension will decrease.
Question-9. Define angle of contact?
Answer-9: Angle of contact, for a pair of solid and liquid, id define as the angle between tangent to the liquid surface drawn at the point of contact and the solid surface inside the liquid.
Question-10. Give some practical applications of surface tension?
Answer-10: Some practical applications of surface tension are
1. A drop of falling liquid is always in spherical shape.
2. We use oily substances to set out hairs.
3. We use soaps and detergent for cleaning clothes.
4. A thin layer of water over the umbrella protects us against light rain.
5. Capillary action e.g. rising of oil in the wick of a lamp.
6. Flying insects can walk on water surface without getting their feel wet.
Frequently Asked Question and Answer on Surface Tesnion Experiment
Surface Tesnion Experiment Interview Questions and Answers in PDF form Online
Surface Tesnion Experiment Questions with Answers
Surface Tesnion Experiment Trivia MCQ Quiz