(b) Is there a transfer of mass from wool to polythene?Ī parallel plate capacitor with air between the plates has a capacitance of 8 pF (1pF = 10 -12 F).
(a) Estimate the number of electrons transferred (from which to which?) What is the force between two small charged spheres having charges of 2 x 10 -7 C and 3 x 10 -7 C placed 30 cm apart in air?Ī polythene piece rubbed with wool is found to have a negative charge of 3 × 10 −7 C. An infinite line charge produces a field of 9 × 10 4 N/C at a distance of 2 cm.
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