1. A 20.0 ?, 9.00 ?, and 9.00 ? resistor are connected in parallel to an emf source. A current of 6.00 A is in the 9.00 ? resistor. Calculate the equivalent resistance of the circuit.
2. What is the source of the potential difference across the source?
3. Calculate the current in the 20.0 ? resistor.
4. Calculate the current in the 9.00 ? resistor.