IIT JEE , AIEEE Forum - Physics , Electricity

dheeraj_joshi

can anybody here explain me about the technique of" nodal concepts " to find equivalent capacitance.

like supose in the following dig wat should the equation be( characters in red are potentials at that point) if each capacitor has capacitance C....

(x-10)C + (x-0)C + (x-0) C = 0 or (10-x)C + (x-0)C + (x-0) C = 0 or something else???

how do v find out??

cvramana

Nodal points method is same as Kirchoff's laws. Use Kirchoff's laws.

dheeraj_joshi

still, which is the right equation?? and how do v decide the signs??

cvramana

Always consider moving from higer potential to lower potential as negative sign and moving from lower potential to higher potential as positive sign.

The same can be also considered reversed. But only one of them is to be considered.