what does the speedometer and odomete of an automobile measure ?
Answers
The speedometer of the automobile will help you to measure the speed of the vehicle, i.e., distance traveled per hour. Odometer is a device fitted in automobiles that measure the distance travelled by that vehicle. Whereas, Speedometer measures the speed.
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Answer:
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Speedometer, instrument that indicates the speed of a vehicle, usually combined with a device known as an odometer that records the distance traveled.
The speed-indicating mechanism of the speedometer is actuated by a circular permanent magnet that is rotated 1,000 revolutions per mile of vehicle travel by a flexible shaft driven by gears at the rear of the transmission. The magnet turns within a movable metal cup made of a light nonmagnetic metal that is attached to the shaft carrying the indicating pointer; the magnetic circuit is completed by a circular stationary field plate surrounding the movable cup. As the magnet rotates it exerts a magnetic drag on the movable cup that tends to turn it against the restraint of a spiral spring. The faster the magnet rotates, the greater is the pull on the cup and the pointer. The speed-indicating dial is graduated in either miles per hour or kilometres per hour or, in certain models, both.
The odometer registers the distance traveled by the vehicle; it consists of a train of gears (with a gear ratio of 1,000:1) that causes a drum, graduated in 10ths of a mile or kilometre, to make one turn per mile or kilometre. A series, commonly of six, such drums is arranged in such a way that one of the numerals on each drum is visible in a rectangular window. The drums are coupled so that 10 revolutions of the first cause 1 revolution of the second, and so forth; the numbers appearing in the window represent the vehicle’s accumulated mileage.
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