Day 18 Capacitors and Capacitance

At the beginning of the class, we did a quiz about Kirchhoff's law. Our task is to final R,V,I, and P in a circuit.

After the quiz, capacitors and capacitive circuits were introduced to us

And we found that the work done by capacitor is 1/2 V^2*C where C is the capacitance.

Then we did an activity to predicting dependence on area and separation which we measure the thickness and the capacitance of pages of a book and graphed D (thinkness) vs. C (Capacitance)

We then did an activity to write an expression for capacitance as a function of ke₀dA. where e is the permitivity. We got C = ke₀dA/d

We did a problem on finding the area and the side length of a capacitor. 

Then, we are given two capacitors and asked to find total capacitance. If the capacitors are in series, we use 1/C1+1/C2 = 1/F. If they are in parallel, we use C1 + C2 = F

Therefore, we did a problem on finding total capacitance.

Also, we find the total work by battery by the equation 1/2 cv^2.

Conclusion

In today's class, we started off by taking a quiz on circuit problem, then we started discussing about capacitor and capacitance and its applcations. We did a lot of problems on capacitance and derived some equation. We also learned to find the work of battery if we know the capacitance.