With the help of suspended magnetic element, a compass can aid people by ______ of the horizontal component of Earth's magnetic field.
举一反三
- 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 ______.
- Permanent magnetism is caused by（）. A: operation of electrical equipment and generators on board ship B: the earth's magnetic field affecting the ship's hard iron during construction C: the horizontal component of the earth's magnetic field acting on the horizontal soft iron D: the vertical component of the earth's magnetic field acting on the vertical soft iro
- If magnetic compass is not affected by any magnetic field other than the Earth’s, which statement is TRUE ___. A: Compass error and variation are equal B: Compass north will be true north C: Variation will equal deviation D: There will be no compass erro
- An inductor stores energy in a magnetic field _________ an electric field.
- 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