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anonymous
 4 years ago
Three 1.0pF capacitors are charged separately to the potential difference of 100,200 and 300 volts. The capacitors are then joined in parallels.What is the resultant potential difference.
anonymous
 4 years ago
Three 1.0pF capacitors are charged separately to the potential difference of 100,200 and 300 volts. The capacitors are then joined in parallels.What is the resultant potential difference.

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nikvist
 4 years ago
Best ResponseYou've already chosen the best response.1\[C_1=C_2=C_3=C=1\,pF\quad,\quad U_1=100V\enspace,\enspace U_2=200V\enspace,\enspace U_3=300V\]\[W_0=\frac{1}{2}C\cdot\left(U_1^2+U_2^2+U_3^2\right)\quad,\quad W=\frac{1}{2}C\cdot 3U^2\]\[W=W_0\quad\Rightarrow\quad 3U^2=U_1^2+U_2^2+U_3^2\]\[U=\sqrt{\frac{U_1^2+U_2^2+U_3^2}{3}}=216.025\,V\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0hey nikvist how do add subscript and superscript in your posts.

nikvist
 4 years ago
Best ResponseYou've already chosen the best response.1\[\mbox{X_2}\quad\Rightarrow\quad X_2\]\[\mbox{X^2}\quad\Rightarrow\quad X^2\]
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