(a) What is the equivalent resistance of the circuit in Figure P31.55? Use the values \(R_{1}=200 \Omega, R_{2}=900 \Omega\), and \(R_{3}=100 \Omega\).

(b) What is the current in the circuit? Assume \(\mathscr{E}=12 \mathrm{~V}\).

(c) The electric potential at location \(\mathrm{d}\) is defined to be 0 , because the negative terminal of the battery is attached to ground. What is the electric potential at locations \

a, b, and c?

Data from Figure P31.55

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HH d