# One end of a horizontal thick copper wire of length 2L and radius 2R is welded to an end of another horizontal thin copper wire of length L and radius R. When the arrangement is stretched by applying forces at two ends, the ratio of the elo

• One end of a horizontal thick copper wire of length 2L and radius 2R is welded to an end of another

horizontal thin copper wire of length L and radius R. When the arrangement is stretched by applying forces
at two ends, the ratio of the elongation in the thin wire to that in the thick wire is?

• The work done on a particle of mass m by a force K[x/(x^2+y^2)^3/2(i)  + y/(x^2+y^2)3/2(j)] (K being a constant of appropriate dimensions, when the particle is taken from the point (a, 0) to the point (0, a) along a circular path of radius a about the origin in the x-y plane is?

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