Which of the Following Is the Most Frequent Cause of Accidental

question 207

Multiple Choice

Which of the following is the most frequent cause of accidental childhood death?

• A)fires and suffocation
• B)motor vehicle accidents
• C)drowning
• D)falls

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Definitions:

Frequency

The number of cycles (of a repeating event) per unit time, measured in hertz (Hz) in the context of waves or electrical signals.

Synchronous Speed

The rotation speed at which the magnetic field in the stator rotates in synchronous machines, typically equal to the AC supply frequency divided by the number of pole pairs.

Synchronous Motor

An AC motor that operates at a constant speed, set by the power supply frequency, and whose rotor is synchronized with the magnetic field of the stator.

Amortisseur Winding

A squirrel-cage winding on the rotor of a synchronous motor used for starting purposes only.