hover said:Homework Statement
What is the capacitance of the two metal spheres shown in the figure ?
sphere one has 20nC of charge and the other has -20nC of charge. The change in voltage is 100V
Homework Equations
C=Q/(change in V)The Attempt at a Solution
My question is how do yo determine what charge to put in for Q?
xcvxcvvc said:It's given.
hover said:but the thing is how would I know to use 20nC or -20nC? What if you had 2 charges that were something like -30nC and 20nC? How do you know what Q to choose?
hover said:So i assume then that the answer here is just 2E-8/100 then
xcvxcvvc said:assumed correct.
The capacitance of the two metal spheres refers to the ability of the two spheres to hold electrical charge when a potential difference is applied between them. It is a measure of the amount of charge that can be stored on the spheres for a given potential difference.
The capacitance of the two metal spheres can be calculated using the formula C = 4πε0(ab)/(a+b), where C is the capacitance, ε0 is the permittivity of free space, a and b are the radii of the two spheres.
The capacitance of the two metal spheres is affected by the distance between the spheres, the size and shape of the spheres, and the material of the spheres. It is also affected by the dielectric material between the spheres, if present.
The capacitance of the two metal spheres is important because it is a key factor in determining the strength of the electric field between the spheres. It also plays a role in various applications such as capacitors in electronic circuits, energy storage devices, and high voltage transmission lines.
The capacitance of the two metal spheres can be measured using a capacitance meter or by using a known voltage and measuring the charge on the spheres. It can also be calculated by measuring the potential difference between the spheres and the amount of charge stored on them.