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سؤال 378

Why should a 5-ampere fuse never be replaced with a 20-ampere fuse?

  1. The larger fuse would be likely to blow because it is rated for higher current
  2. The power supply ripple would greatly increase
  3. Excessive current could cause a fireپاسخ درست
  4. Voltage drop in the higher current fuse could result in excessively low voltage to the device

توضیح

The fuse rating is chosen to protect the wiring and equipment, so a circuit built for 5 amperes will be allowed to draw four times that current before a 20-ampere fuse opens. The wiring and components can overheat and start a fire long before the larger fuse blows.

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شروع تمرین
سؤال 378: Why should a 5-ampere fuse never be replaced with a… · FCC Technician Class (Element 2) · Questena