magnetic needle

Example Sentences

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Finding the magnetoreceptors responsible for triggering these neurons has been like looking for a magnetic needle in a haystack.

From Science Magazine • Jun. 23, 2016

He said: "Nothing must deflect the magnetic needle."

From Time Magazine Archive

Last week Bendix Aviation Corp. announced a new automatic compass that makes the old magnetic needle* look as obsolete as a warrior's spear.

From Time Magazine Archive

A magnetic needle consists of a small bar magnet, supported upon a pivot or suspended so that it is free to turn in a horizontal or vertical plane.

From Hawkins Electrical Guide, Number One Questions, Answers, & Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to acquire a Working Knowledge of Electricity and its Applications by Hawkins, Nehemiah

With the magnetic needle they began to sail farther away from the shores, and since then they have discovered many new seas.

From Fables for Children, Stories for Children, Natural Science Stories, Popular Education, Decembrists, Moral Tales by Tolstoy, Leo, graf