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Question

The general range of speed in revolutions per minute(rpm) at which floppy disks rotate is?

A
24004700
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B
390600
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C
150250
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D
300600
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E
None of the above
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Solution

The correct option is B 150250

The general range of speed in revolutions per minute(rpm) at which floppy disks rotate is 150−250.

Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min) is the number of turns in one minute. It is a unit of rotational speed or the frequency of rotation around a fixed axis.

To calculate the circumference, you can just multiply the diameter by π, which is about 3.142. That gives you the distance for each revolution. Then you can multiply by the number of revolutions per minute.

A floppy disk is a lot like a cassette tape Both use a thin plastic base material coated with iron oxide. This oxide is a ferromagnetic material, meaning that if you expose it to a magnetic field it is permanently magnetized by the field.


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