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Problem

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Textbook Expert
Textbook ExpertVerified Tutor
15 Nov 2021

Given information

To obtain the current assumption the concept of inductance applies also to an isolated coil. Whenever a changing current passes through a coil or solenoid the magnetic flux is produced within self of the coil.

Step-by-step explanation

Step 1.

Explanation:

magnet can be induced by the required current to form flashlight.

will be the required number.

 

Here,

the given formula,

 

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