- published: 11 Dec 2014
- views: 11446651
A dynamo (from the Greek word dynamis; meaning power), originally another name for an electrical generator, generally means a generator that produces direct current with the use of a commutator. Dynamos were the first electrical generators capable of delivering power for industry, and the foundation upon which many other later electric-power conversion devices were based, including the electric motor, the alternating-current alternator, and the rotary converter. Today, the simpler alternator dominates large scale power generation, for efficiency, reliability and cost reasons. A dynamo has the disadvantages of a mechanical commutator. Also, converting alternating to direct current using power rectification devices (hollow state or more recently solid state) is effective and usually economic.
The word still has some regional usage as a replacement for the word generator. A small electrical generator built into the hub of a bicycle wheel to power lights is called a Hub dynamo, although these are invariably AC devices.[citation needed]
Hey there, What ya gonna do?
Keep the faith inside of you
This whole world could fall apart
But you're still the brightest star
Hey girl, who ya livin' with?
That guy's just a little kid
Spent his money on a car
Drove it to the nearest bar
Yeah yeah yeah
What ya gonna do about it?
This is your chance to shine and
Lift up your heart and sing
Life is a precious thing
Life is a precious thing
Life is a precious thing
Old man living on the street
Scaring people off their feet
But he's not starting World War III
He wants to live in harmony
See that hound dog on the floor?
Lying by the kitchen door
He don't care about a thing
His ignorance is not a sin
Yeah yeah yeah
What ya gonna do about it?
This is your chance to shine and
Lift up your heart and sing
Life is a precious thing
Doo doo doo