Necessity
Some implications of the displacement current follow, which agree with experimental observation, and with the requirements of logical consistency for the theory of electromagnetism.
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Famous quotes containing the word necessity:
“The objects of a financier are, then, to secure an ample revenue; to impose it with judgment and equality; to employ it economically; and, when necessity obliges him to make use of credit, to secure its foundations in that instance, and for ever, by the clearness and candour of his proceedings, the exactness of his calculations, and the solidity of his funds.”
—Edmund Burke (1729–1797)
“If necessity is the mother of invention, then resourcefulness is the father.”
—Beulah Louise Henry, U.S. inventor. As quoted in Feminine Ingenuity, ch. 13, by Anne L. MacDonald (1992)
“Teach thy necessity to reason thus:
There is no virtue like necessity.”
—William Shakespeare (1564–1616)