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## Homework Statement

In the circuit given (attached) , point S is earthed , what are the electrical potentials at point P , Q and R .

## Homework Equations

Kirchoff's second law .

## The Attempt at a Solution

The electric potential at point S is 0 . By applying Kirchoff's second law ,

I(2+3)=15-5

I=2A

i am not sure where to go from here .