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Question

Why inductor does not allow sudden change in current?


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Solution

Inductor: An inductor is an electrical component that is made up of a conducting wire wound in the form of a coil, that resists the change in the electrical current passing through it due to induced emf which opposes the change in magnetic flux through the coil.

Explanation:

  1. The voltage developed across the inductor is given by, V=Ldi/dt
  2. If we change the current suddenly inside an inductor which means, the current di changes in a very small time dt which is approximately equal to zero.
  3. Due to this sudden change in current, the voltage becomes infinite, Since infinite voltage does not exist.

Hence, the sudden change in current is not allowed in an inductor.


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