An electromagnetic coil is an electrical conductor such as a wire in the shape of a coil, spiral or helix. Electromagnetic coils are used in electrical engineering, in applications where electric currents interact with magnetic fields, in devices such as inductors, electromagnets, transformers, and sensor coils.
Causes of lower back spasms. Back spasms can be the result of injuries to the muscles, tendons, and ligaments in the back or it can be related to more serious medical conditions. Heavy lifting is a common cause of back spasms. Any activity that puts excessive strain on the muscles and ligaments in the lower back can cause an injury.
If your back spasm does not get better in 1 to 2 weeks, or it comes and goes in the same spot, you may have an underlying problem in your spine. Underlying issues that could cause your back to spasm include: 1  Facet joint osteoarthritis. 2  Pain from a herniated disc.f you experience a back muscle spasm, make sure to stop and listen to your body. Either your back is telling you not to do that activity ever again, or it's warning you that there's a more serious underlying issue. 1  See Pulled Back Muscle and Lower Back Strain.