| 单词 | return shock |
| 释义 | > as lemmasreturn shock return shock n. [compare French choc de retour (1842)] now rare an electric current indirectly produced in a conducting object by a nearby electrical discharge (esp. a lightning strike), often manifesting as an injurious or fatal electric shock within people or animals.An electrical conductor near a strong electric charge has a charge of the opposite polarity induced within itself; in an electrical discharge this strong inducing charge is neutralized, causing the induced charge to suddenly flow in order to restore the neutrality of the body. ΚΠ 1841 Polytechnic Jrnl. Oct. 241 The phenomenon of the return shock was referred to, by which, objects on the earth's surface might be severely injured. 1881 S. P. Thompson Elem. Lessons Electr. & Magn. i. §26. 28 When a charged conductor is suddenly discharged, a discharge is felt by persons standing near, or may even affect electroscopes, or yield sparks. This action, known as the ‘return-shock’, is due to induction. 1911 E. C. Hill Text-bk. Chem. (ed. 2) 51 Persons at some distance from the spot where a ‘lightning-stroke’ occurs often suffer from what is styled the return shock. < as lemmas |
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