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Find the self-inductance of a 100-turn solenoid with a cross-sectional area of 10 cm\(^2\) and a length of 62.8 cm.

Answer :

The self-inductance of a solenoid can be calculated using the formula[tex]L = (μâ‚€ * N² * A) / l[/tex], where L is the self-inductance, N is the number of turns, A is the cross-sectional area, and l is the length of the solenoid.



In this case, we are given that the solenoid has 100 turns, a cross-sectional area of 10 cm², and a length of 62.8 cm.

First, let's convert the given values into SI units. The cross-sectional area can be converted from cm² to m² by dividing by [tex]10000 (1 m² = 10000 cm²)[/tex]. So, the cross-sectional area is[tex]10 cm² / 10000 = 0.001 m².[/tex]

Next, let's convert the length from cm to m by dividing by 100 (1 m = 100 cm). So, the length is 62.8 cm / 100 = 0.628 m.

Now, we can substitute the values into the formula:
[tex]L = (μâ‚€ * N² * A) / l = (4π * 10^-7 T·m/A * 100² turns² * 0.001 m²) / 0.628 m[/tex]


Calculating this expression gives us the self-inductance of the solenoid.

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