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geomagnetism

(Encyclopedia)geomagnetism: see magnetism.

diamagnetism

(Encyclopedia)diamagnetism: see magnetism.

ferromagnetism

(Encyclopedia)ferromagnetism: see magnetism.

paramagnetism

(Encyclopedia)paramagnetism: see magnetism.

(Encyclopedia)CE5 Motor: In the AC motor, current fed to the conducting loop of wire causes it to rotate in the magnetic field, thus turning the shaft on which the loop is mounted. In the DC motor, the direction...

logic

(Encyclopedia)logic, the systematic study of valid inference. A distinction is drawn between logical validity and truth. Validity merely refers to formal properties of the process of inference. Thus, a conclusion w...

Arago, Dominique François

(Encyclopedia)Arago, Dominique François dômēnēkˈ fräNswäˈ ärägōˈ [key], 1786–1853, French physicist and astronomer. He is noted for his discoveries in magnetism and optics as well as for his astronomi...

electrochemistry

(Encyclopedia)electrochemistry, science dealing with the relationship between electricity and chemical changes. Of principal interest are the reactions that take place between electrodes and the electrolytes in ele...

electric shock

(Encyclopedia)electric shock, effect of the passage of a current of electricity through the body. Fatality may result from shocks of from 1 to 2 amperes and 500 to 1,000 volts. However, the effect of electric shock...

Braid, James

(Encyclopedia)Braid, James, 1795?–1860, English surgeon and writer on hypnotism and magic. The first to use the term hypnotism instead of mesmerism or animal magnetism, he also demonstrated that it was achieved b...