Complex sentence: As alternating or direct current flows through the coil and induces a magnetic field in both vanes, the vanes repel each other and the moving vane deflects against the restoring force provided by fine helical springs.
Split into simpler sentences: As alternating or direct current flows through the coil and induces a magnetic field in both vanes. The vanes repel each other and the moving vane deflects against the restoring force provided by fine helical springs.