(a) Define the SI unit of self-inductance.

(b) The self-inductance of a solenoid is L. If the number of turns per unit length in it is doubled and the area of cross-section is halved, find the new inductance of the solenoid.

 

 
 
 
 
 

Answers (1)
S safeer

a) The self-inductance of a coil is said to be one henry if the magnetic flux of one weber is produced when a current of one ampere flows through it.

b)

L\propto n^2A

L'\propto( 2n)^2\frac{A}{2}=2L

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