The singular possessive form of the invention of Edison is Edison's invention.
Note: The noun Edison is a proper noun, the name of a person. Proper nouns are always capitalized.
The word 'electrical' is an adjective. Adjectives don't have possessive forms.The possessive form of the plural noun charges is charges'.example: The charges' indicator reads at 50 percent.The possessive form of the singular noun power is power's.example: Your power's connection has been cut.
Battery's
In 1915, aged 68, he invented the first synthetic form of carbolic acid (C6H6O). He died in 1931, aged 84, in New Jersey, USA.
It is not exactly correct to describe electricity as an invention. There are a great many inventions that use electricity, but electricity itself is part of the natural world (most obviously in the form of lightning). Therefore it was discovered, rather than invented. The discovery of electricity and the various uses that were invented for it have transformed our world in very profound ways. Almost all of modern technology depends, directly or indirectly, on electricity and its uses. Without it, we would still be living in the middle ages.
These are contact arrangements that can be found on switches and relays. The form designation is fairly old and rarely used now. Form A: a single, normally open contact that closes upon actuation. Form B: same as A, except in reverse. A normally closed contact that opens. Form C: A form A contact connected to a form B. The Form C contact has three wires, NO (normally open), NC (normally closed) and C (common). Upon actuation, the NO contact closes (continuity from NO-C) and the NC contact opens (no continuity from NC-C). It is more common now to see the following designations: Forms A and B can also be referred to as single pole-single throw: SPST-NO = Form A SPST-NC = Form B and Form C can be referred to as single pole-double throw: SPDT = Form C
The singular possessive form is week's.
The singular possessive form is classmate's.
The possessive form is Amos's.
The singular possessive form for the noun gypsy is gypsy's.
The singular possessive form for country is county's.
The singular form for the plural noun countries is country; the singular possessive form is country's.
singular possessive: boy'splural possessive: boys'
The singular possessive form is aircraft's.
The singular possessive form is frontiersman's.
The singular possessive form is contralto's.
The singular possessive form is speculum's.
The singular possessive form is herd's.