3. [30 POINTS] The upper portion of the circuit in the figure shown is fixed. The horizontal wire at the bottom has a mass of 10.0 g and is 5. 00 cm long. This wire hangs in the gravitational field of the Earth from identical light springs connected to the upper portion of the circuit. The springs stretch 0. 500 cm under the weight of the wire, and the circuit has a total resistance of 12.0 ). When a magnetic field is turned on, directed out of the page, the springs stretch an additional 0.300 cm. Only the horizontal wire at the bottom of the circuit 1s in the magnetic field. What is the magnitude of the magnetic field? 240V +_ FERRRENY 5.00 cm =l out