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Q. 24

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 870

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Short Answer

The maximum allowable potential difference across a 200 mH inductor is 400 V. You need to raise the current through the inductor from 1.0 A to 3.0 A. What is the minimum time you should allow for changing the current?

The minimum time allowed for changing the current is 1 ms.

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Step by Step Solution

Given information 

We have given that, the maximum allowable potential difference across a 200 mH inductor is 400 V, and current has to be raised through the inductor from 1.0 A to 3.0 A.

Step 1.

We will use induced emf formula to calculate time.

here = Induced emf

= Self inductance

= Change in current

= time

Step 2.

Substituting the values in formula :

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