Three 15 OMH resistors are connected in parallel. This arrangement is connected in the series with a 10 OMH resistor. The entire combination is unplaced across a 45 V difference in potential.
1- draw a diagram of the circuit
2- what is the equivalent resistance of a parallel portion of the circuit?
3- equivalent resistance of the entire circuit?
4- current in the entire circuit?
5- what is the voltage drop across the 10 OMH resistor?