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Infinite rods of uniform mass density and length L,L/2,L/4….. Are placed one upon another upto infinite as shown in figure. Find the x-coordinate of centre of mass.

A small square loop of wire of side l is placed inside a large square loop of wire of side L(L>>l) .The loops are coplanar and their centers coincide.The mutual inductance of the system is proportional to

(a) A uniform rod of mass M and length L is placed at distance L from a point mass m as shown. Find force on m (b) A semiconductor wire has a length L and mass M . A particle of mass m is placed at the centre of the circle. find the gravitational attraction on the particle due to the wire.

Total number of boys and girsl visited the place on Monday and Tuesday together is ho much more than the total number of boys and girsl visited the place on Thursday and Friday together ?