The magnetic field of an electromagnet. The magnetic field around an electromagnet is just the same as the one around a bar magnet. It can, however, be reversed by turning the battery around.Unlike bar magnets, which are permanent magnets, the magnetism of electromagnets can be turned on and off just by closing or opening the switch.1  Page.2  1.he magnetic field around an electromagnet is just the same as the one around a bar magnet. It can, however, be reversed by turning the battery around. Unlike bar magnets, which are permanent magnets, the magnetism of electromagnets can be turned on and off just by closing or opening the switch. 1  Page. 2  1.
Pertinent is an adjective which means relevant to the issue at hand. It is synonymous to appropriate, fitting, applicable and suitable. Pertinent is an adjective which means relevant to the issue at hand. It is synonymous to appropriate, fitting, applicable and suitable.
countable noun. A portent is something that indicates what is likely to happen in the future. [formal] The savage civil war there could be a portent of what's to come in the rest of the region. I hope this is a portent for the rest of the year. As for her engagement with Adam, I would say the portents are gloomy. Synonyms: omen, sign, warning, threat More Synonyms of portent.