Capacitance help

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#1
its question 2ci on this
https://pmt.physicsandmathstutor.com...Capacitors.pdf

https://pmt.physicsandmathstutor.com...itors%20MS.pdf

I dont understand the ratio part in the answers like why is the charge divided by 1000?
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1 year ago
#2
(Original post by ella sian)
its question 2ci on this
https://pmt.physicsandmathstutor.com...Capacitors.pdf

https://pmt.physicsandmathstutor.com...itors%20MS.pdf

I dont understand the ratio part in the answers like why is the charge divided by 1000?
Capacitance of ball is 1.2x10-11 - you're given this in question 2a

Capacitance of the parallel capacitor in 2c is 1.2x10-8

The capacitance of the ball is 1/1000 th (or 1x10-3) of the capacitance of the capacitor
which is the same thing as saying the capacitor has a capacitance 1000 times (or 1.0x103) higher than the capacitance of ball
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