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qUESTIONS

If the surface area of any liquid surface is increased by 50%, then its surface tension will

When a mercury drop of radius R, breaks into ‘n’ droplet of equal size, the radius (r) of each droplet is:

A number of droplets, each of radius ‘r’ combine to form a drop of radius ‘R’. If ‘T” is the surface tension, the rise in temperature will be:(Assume that the energy evolved is converted into heat)

A frame made of metallic wire enclosing a surface area is covered with a soap film. If the area of the frame of metallic wire is reduced by 50%, the energy of the soap film will be changed by

The excess pressure inside a spherical drop of radius of a liquid of surface tension Tis

There are n1 photons of frequency v1 in a beam of light. In an equally energetic beam there are n2 photons of frequency v2. Then the correct relation

If the work done in blowing a bubble of volume V is W then the work done in blowing a soap bubble of volume 2V will be

A particle A has a charge q and particle B has charge +4q with each of them having the mass m. When they are allowed to fall from rest through same potential difference the ratio of their speeds vA/vB will be

An electron and a proton are moving in the same direction with same kinetic energy. The ratio of the de- Broglie wavelength associated with these particles is

Two mercury drop (each of radius r) merge to form a bigger drop. If T is the surface tension, the surface energy of biggest drop is

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