A capacitor with capacitance C = 6.00×10-3 F is initially uncharged. It is in series with a source of Emf of 6.00 volts, a resistor R, and a switch as shown in the figure below.

Question

anonymous · Answer

At t=0, the switch is closed. The graph below shows the potential difference across the capacitor as function of t, the time elapsed since the switch closed.

anonymous · Answer

attachment

anonymous · Answer

Calculate the value of R. Note that the curve passes through a grid intersection point.

anonymous · Answer

$$V=V _{0}(1-e ^{\frac{ -t }{ RC }})$$
and use the same steps as the other question.

anonymous · Answer

how do you know which points to use?

anonymous · Answer

which is obvious for your naked eye and it should goes through the vertex of the square in the graph as it will give you specific value like 
|dw:1405400637159:dw|
as any other point will be difficult to know its value.