we also know that the charge on a pair of parallel plates isproportional to the

Question

we also know that the charge on a pair of parallel plates isproportional to the potential difference V, namelyq=CV. We also know that the capacitanceof two parallel plates is given byC=0A/d,
where 0=8.85×10-12 isthe permittivity of free space and d is the separationbetween the plates. Combine these equations and to get the force asa function of the potential. So now if you were to make a graph offorce (F) vs.V2/d2, the slope of thegraph would be 0A/2

So now let's say that you find a slope of1.120×10-13 for square plates of width 16.5 cm.What do you get for the value of the permittivity of freespace?


If the uncertanty in the slope is3.921×10-15, is the measured value of0 within experimental uncertainty of theaccepted value?

YES
NO
mark the right answer

Explanation / Answer

the slope of the graph is (oA/2) = 1.120 * 10^-13 ----------(1) the width of the plates is a = 16.5 cm = 16.5 * 10^-2 m from (1) o= (2 * 1.120 * 10^-13/A) = (2 * 1.120 *10^-13/a^2) the measured value of o is within theexperimental uncertainity of the accepted value.This is because theuncertainity in the slope is very small and hence the values of xchanges radiply with the values of y.

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---