Question
Two equal balls having equal positive charge ‘q’ coulombs are suspended by two insulating strings of equal length. What would be the effect on the force when a plastic sheet is inserted between the two?
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Answer
Force decreases.
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Answer the following:
What are the forms of energy into which the electrical energy of the atmosphere is dissipated during a lightning? (Hint: The earth has an electric field of about 100Vm–1 at its surface in the downward direction, corresponding to a surface charge density = –10–9 Cm–2. Due to the slight conductivity of the atmosphere up to about 50km (beyond which it is good conductor), about + 1800C is pumped every second into the earth as a whole. The earth, however, does not get discharged since thunderstorms and lightning occurring continually all over the globe pump an equal amount of negative charge on the earth.)
What are the forms of energy into which the electrical energy of the atmosphere is dissipated during a lightning? (Hint: The earth has an electric field of about 100Vm–1 at its surface in the downward direction, corresponding to a surface charge density = –10–9 Cm–2. Due to the slight conductivity of the atmosphere up to about 50km (beyond which it is good conductor), about + 1800C is pumped every second into the earth as a whole. The earth, however, does not get discharged since thunderstorms and lightning occurring continually all over the globe pump an equal amount of negative charge on the earth.)