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The equivalent capacitance of the combin...


The equivalent capacitance of the combination shown in the figure between P and Q is `30muF`, the capacitance of capacitor C is

A

`20muF`

B

`30muF`

C

`40muF`

D

`60muF`

Text Solution

Verified by Experts

The correct Answer is:
D
Capacitance of parallel combination of three capacitors ltbRgt (each of `20muF`)
`C'=20+20+20`
`=60muF`
Now, `(1)/(C)+(1)/(C')=(1)/(30)` or
`(1)/(C)=(1)/(30)-(1)/(60)=(1)/(60)` or `C=60muF`
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Knowledge Check

  • The equivalent capacitance of the combination of the capacitors is :

    A
    `3.20 muF`
    B
    `7.80 muF`
    C
    `3.90 muF`
    D
    `2.16 muF`

  • The equivalent capacitance of the combination of the capacitors is :

    A
    `3.20 muF`
    B
    `7.80 muF`
    C
    `3.90 muF`
    D
    `2.16 muF`

  • Find the equivalent capacitance of the combination shown in figure (31.10) between the points P and N.

    A
    15 uF
    B
    3uF
    C
    4uF
    D
    7uF

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