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a 20uf capacitor charged to 30v and a 15uF capacitor charged to 20V are connected to...

a 20uf capacitor charged to 30v and a 15uF capacitor charged to 20V are connected to each other with the positive plate of each connected to each other,with the posirive plate of each connected to the negative plate of the other. What is the final charge stored on the 20 uf capacitor
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