Both nickel and iron are whitish metals ____. A: that are attracted by magnets B: that magnets are attracted by them C: are attracted by magnets D: magnets that attract them
Both nickel and iron are whitish metals ____. A: that are attracted by magnets B: that magnets are attracted by them C: are attracted by magnets D: magnets that attract them
14. The magnetic compass magnets are acted on by the horizontal component of the Earth's total magnetic force. This magnetic force is GREATEST at the ______.
14. The magnetic compass magnets are acted on by the horizontal component of the Earth's total magnetic force. This magnetic force is GREATEST at the ______.
According to ancient records, natural magnets were employed in China as direction-finding devices. This led to the first compass, called ( ) during the Warring States Period.
According to ancient records, natural magnets were employed in China as direction-finding devices. This led to the first compass, called ( ) during the Warring States Period.
The frequency of an alternator at a given r/min is determined by the _______ . A.number of turns of wire in the armature coil B.number of magnetic poles C.strength of the magnets used D.output voltage
The frequency of an alternator at a given r/min is determined by the _______ . A.number of turns of wire in the armature coil B.number of magnetic poles C.strength of the magnets used D.output voltage
According to ancient records, natural magnets were employed in China as direction-finding devices. This led to the first compass, called ( ) during the Warring States Period. A: wet compass B: Si Nan C: dry compass D: navy compass
According to ancient records, natural magnets were employed in China as direction-finding devices. This led to the first compass, called ( ) during the Warring States Period. A: wet compass B: Si Nan C: dry compass D: navy compass
Which magnetic compass corrector（s）CANNOT be set on a heading of magnetic east or magnetic west（）. A: Heeling magnet B: Flinders bar C: Fore-and-aft magnets D: All of the above can be set on magnetic east or magnetic west heading
Which magnetic compass corrector（s）CANNOT be set on a heading of magnetic east or magnetic west（）. A: Heeling magnet B: Flinders bar C: Fore-and-aft magnets D: All of the above can be set on magnetic east or magnetic west heading
turning on turned out turned down turn over turned off 1) She all the job offers and is currently planning to be a housewife. 2) To my surprise, the house they had offered us to be a tiny apartment. 3) We should the page and let it go. Anyway, tomorrow is another day. 4) Why are you all me ? We are supposed to be a team, to think as one, to fight as one. 5) Most magnets (磁铁), like the ones on many refrigerators, cannot be ; they are called permenent magnets.
turning on turned out turned down turn over turned off 1) She all the job offers and is currently planning to be a housewife. 2) To my surprise, the house they had offered us to be a tiny apartment. 3) We should the page and let it go. Anyway, tomorrow is another day. 4) Why are you all me ? We are supposed to be a team, to think as one, to fight as one. 5) Most magnets (磁铁), like the ones on many refrigerators, cannot be ; they are called permenent magnets.
The magnetic field of the dynamo or alternator can be provided by either electromagnets or permanent magnets mounted on either the rotor or the stator. A: 通过安装在转子或定子上的电磁铁或永磁铁，可以形成直流发电机或交流发电机所需的磁场。 B: 通过被安装在转子或定子上的电磁铁或永磁铁，可以形成直流发电机或交流发电机所需的磁场。 C: 通过被安装在转子或定子上的电磁铁或永磁铁，我们可以形成直流发电机或交流发电机所需的磁场。 D: 通过被安装在转子或定子上的电磁铁或永磁铁，可以提供直流发电机或交流发电机所需的磁场。
The magnetic field of the dynamo or alternator can be provided by either electromagnets or permanent magnets mounted on either the rotor or the stator. A: 通过安装在转子或定子上的电磁铁或永磁铁，可以形成直流发电机或交流发电机所需的磁场。 B: 通过被安装在转子或定子上的电磁铁或永磁铁，可以形成直流发电机或交流发电机所需的磁场。 C: 通过被安装在转子或定子上的电磁铁或永磁铁，我们可以形成直流发电机或交流发电机所需的磁场。 D: 通过被安装在转子或定子上的电磁铁或永磁铁，可以提供直流发电机或交流发电机所需的磁场。