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We have a soap bubble on the end of a thin glass pipe, as shown (Figure 1). The bubble has a radius r and carries a charge q. Air is free to enter or leave the bubble through the pipe. Figure 1 of 1 Part A Find the electrostatic potential energy Uelec of the bubble. (Ignore any effect from the glass tube. ) Write your answer in terms of q, r and ϵ0. Part B Find the radius r at which the total potential energy is a minimum. Write your answer in terms of q, τ and ϵ0.

We have a soap bubble on the end of a thin glass pipe, as shown (Figure 1). The bubble has a radius r and carries a charge q. Air is free to enter or leave the bubble through the pipe. Figure 1 of 1 Part A Find the electrostatic potential energy Uelec of the bubble. (Ignore any effect from the glass tube. ) Write your answer in terms of q, r and ϵ0. Part B Find the radius r at which the total potential energy is a minimum. Write your answer in terms of q, τ and ϵ0.We have a soap bubble on the end of a thin glass pipe, as shown (Figure 1). The bubble has a radius r and carries a charge q. Air is free to enter or leave the bubble through the pipe. Figure 1 of 1 Part A Find the electrostatic potential energy Uelec of the bubble. (Ignore any effect from the glass tube. ) Write your answer in terms of q, r and ϵ0. Part B Find the radius r at which the total potential energy is a minimum. Write your answer in terms of q, τ and ϵ0.

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We have a soap bubble on the end of a thin glass pipe, as shown (Figure 1). The bubble has a radius r and carries a charge q . Air is free to enter or leave the bubble through the pipe.
Figure 1 of 1 Part A
Find the electrostatic potential energy U elec of the bubble. (Ignore any effect from the glass tube.)
Write your answer in terms of q , r and ϵ 0 .
Part B
Find the radius r at which the total potential energy is a minimum. Write your answer in terms of q , τ and ϵ 0 .

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