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woleraymond

  • 3 years ago

In figure below if a charge of 4uc flows from the 6V battery to plate P of the 1 uF capacitor. what charge flow from a - Q to R b - S to the battery c - What is the pd across C1 and C2 d - What is capacitance of C2 e - What is the single capacitor which is equivalent to C1 and C2 in series and what charge would it store?

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  1. woleraymond
    • 3 years ago
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    |dw:1349123247879:dw|

  2. Algebraic!
    • 3 years ago
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    a. 4uC b. 4uC c. 6V d. \[Q = C _{eq}V\] \[\frac{ 1 }{ C _{eq}} = \frac{ 1 }{ C _{1}}+\frac{ 1 }{ C _{2}}\] \[Q = ( \frac{ 1 }{ C _{1}}+\frac{ 1 }{ C _{2}})^{-1}V\]

  3. Algebraic!
    • 3 years ago
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    make sense?

  4. masumanwar
    • 3 years ago
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    use conservation of charge

  5. woleraymond
    • 3 years ago
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    @Algebraic! please can you explain how u derived a,b,c

  6. Algebraic!
    • 3 years ago
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    if +4uC is on the plate at P then -4uC will be on the plate at Q meaning +4uC flowed to the plate at R meaning that there's - 4 uC at the plate at S meaning +4uC flowed to the terminal of the battery. For c. ) I did the total voltage drop, which must be 6V, you could also do the drop per capacitor, and then find the capacitance of c2 from that. I didn't do it that way, I combined the solution to d and e into one part instead.

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