SURFACE TENSION
Quiz by Anie Jose
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8 questions
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- Q1When water droplets merge to form a bigger drop ..Energy is liberatedEnergy is neither liberated nor absorbedEnergy is absorbedDepends on the nature of the liquid60s
- Q2Air is pushed into a soap bubble (radius=r) to double its radius. If surface tension is T, the work done is24πr2T12πr2T8πr2T16πr2T120s
- Q3If air is pushed into a soap bubble, the pressure in itIncreasesCannot sayRemains the sameDecreases60s
- Q4Fig shows a tube of raiud r dipped in water. If atmospheric pressure = P0, pressure at A isP0 + 2T/rP0P0 - 4T/rP0 - 2T/r120s
- Q5When a capillary tube is dipped into liquid, the liquid neither rises nor fallsAngle of contact of liquid must be 90Surface tension of liquid may be zeroAngle of contact of liquid must be 0Surface tension of liquid must be zero60s
- Q6By surface of a liquid we meana layer of thickness of order of 10-4 ma geometric plane like x=0a layer of thickness of order of 10-8 mall molecules exposed to atmosphere45s
- Q7An ice cube is suspended in vacuum in a gravity free hall. As the ice melts ...will change its shape to sphericalwill retain its cubical shapewill fly upwill fall down on the floor of the hall60s
- Q8The dimension M1L0T-2 can correspond tocoefficient of viscositymoment of a forcemodulus of elasticitysurface tension60s
