A simple DC circuit with a battery of 43 volts and variable resistance is shown below. The circuit is half-immersed in a uniform magnetic field of 110×10^−3T. a) When the switch is open, what is the magnitude of the force on the coil due to the field? Assume that the length of arm AB is 13cm. b) When the switch is closed, what is the magnitude of the force on the coil due to the field? Please note that the arm AB of the circuit (connected to the spring) is NOT immersed in the magnetic field. Use R=13kΩ as the value for the variable resistance if needed. c) If the spring has spring constant 14N/m, find how much it stretches after the switch is closed/Distance from equilibrium after the switch is closed?

A simple DC circuit with a battery of 43 volts and variable resistance is shown below. The circuit is half-immersed in a uniform magnetic field of 110×10^−3T. a) When the switch is open, what is the magnitude of the force on the coil due to the field? Assume that the length of arm AB is 13cm. b) When the switch is closed, what is the magnitude of the force on the coil due to the field? Please note that the arm AB of the circuit (connected to the spring) is NOT immersed in the magnetic field. Use R=13kΩ as the value for the variable resistance if needed. c) If the spring has spring constant 14N/m, find how much it stretches after the switch is closed/Distance from equilibrium after the switch is closed?