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Q1. A small positively charged metal ball is lowered into a metal can. Describe with the help of the diagram how charges are distributed in the system when i) ball is well inside the can but not touching it. ii) Ball is made to touch the inside of the can.

Q2. A wooden raft has a mass of 76 kg. When empty it floats in water (density 1000 kg/m3) with 51 percent of its volume submerged. What mass of sand can be put on the raft without it sinking?

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