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(a) calculate the force between two small charged spheres having charges 0.4 C and 0.02mC separated by 30cm in air. (b) what is the nature of the force ? (c) If a sheet of mica of relative permittivity 4fills the spacebetween the spheres what will be the force.? (d) If a sheet of iron of thickness10 cm.is introduced between the charges what will happen to the force between them?


(a) calculate the force between two small charged spheres having charges 0.4C and 0.02mC separated by 30cm in air.
(b) what is the nature of the force ? (c) If a sheet of mica of relative permittivity 4fills the spacebetween the spheres what will be the force.? (d) If  a sheet of iron of thickness10 cm.is introduced between the charges what will happen to the force between them?


Grade:10

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