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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A glass rod is rubbed with a silk cloth. The glass rod acquires a charge of +19.2×10−19C . (i) find the number of electrons lost by glass rod. (ii) Find the negative charge acquired by silk. (iii) Is there transfer of mass from glass to silk?

A glass rod is rubbed with a silk cloth. The glass rod acquires a charge of +19.2×10−19C . (i) find the number of electrons lost by glass rod. (ii) Find the negative charge acquired by silk. (iii) Is there transfer of mass from glass to silk?

A sphere is dropped under gravity through a fluid of viscosity η . Taking the average ac celeration as half of the initial ac celeration show that the time to attain the terminal velocity is independent of the fluid density.