Question

the circuit below shows some circuitry in a small toy robot when the circuit is on the robot moves its arms in blinks a light on its head
9v battery
18ohms motor
18ohms light

Answer 1

Not sure of what you're asking for but, here the unknown is the current of the circuit.
Use the formula V = IR
We could tell that it's in a series.
Solve for I:
I = 9v/(18 + 18)
I = 0.25 OHMS