XI Physics Test Papers

Complete Collection

Q Define Surface Tension. Describe relationship between surface tension and surface energy.

Ans. Surface tension is the property of the surface of a liquid that allows it to resist an external force, it is due to the cohesive nature of the fluid molecules.

Q34  

Q35 (i) A system exhibiting SHM must have - both elasticity and inertia

(ii) mechanical energy of SHM is never zero

(iii) When the displacement of a particle executing SHM is half of its amplitude, the ratio of KE to PE is 3:1

(iv) The velocity of a particle executing SHM when it is at its extreme position is - zero

(v) If the mass of bob of a simple pendulum is increased by 50%, the time period of the pendulum: independent of mass