1. In case there is no current in a conductor, there can be no electric field around it.
2. Should a permanent magnet be moved in and out of a coil of wire, both the magnet and the coil would be used as a simple electric generator.
3. Had there been no Earth's gravitation, the artificial satellites would have moved through airless space in a straight line at a uniform speed.
4. It would have been impossible to launch space satellites and space rockets provided we had not had the necessary polymeric materials and synthetic fuels.
5. Unless the temperature rises, the speed of the motion of the molecules will not increase.
6. Were the temperature increased, the velocity of the molecular motion would also be increased.
7. If you were asked: "How can electric charges be made to flow and what factors influence their flow?" what would you answer?