Which factor is immaterial for the wire used in el
Question:

Which factor is immaterial for the wire used in electric fuse?

Updated On: Jun 6, 2024
  • Length
  • Radius
  • Material
  • Current
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The Correct Option is A

Solution and Explanation

Electric fuse is a type of over current protection device. They are engineered to contribute a negligible amount of extra resistance to the circuits they protect. This is largely accomplished by making the fuse wire as short as possible. Fuse are primarily rated as current amperes. A fuse wire of certain material and gauge will blow at a certain current no matter how long it is. Since, length is not a factor in current rating the shorter it can be made the less resistance it will have end to end.
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Concepts Used:

Electromagnetic Induction

Electromagnetic Induction is a current produced by the voltage production due to a changing magnetic field. This happens in one of the two conditions:-

  1. When we place the conductor in a changing magnetic field.
  2. When the conductor constantly moves in a stationary field.

Formula:

The electromagnetic induction is mathematically represented as:-

e=N × d∅.dt

Where

  • e = induced voltage
  • N = number of turns in the coil
  • Φ = Magnetic flux (This is the amount of magnetic field present on the surface)
  • t = time

Applications of Electromagnetic Induction

  1. Electromagnetic induction in AC generator
  2. Electrical Transformers
  3. Magnetic Flow Meter