The self-inductance of two solenoids A and B having equal length are same. If the number of turns in two solenoids A and B are 100 and 200 respectively the ratio of the radii of their cross section will be ........

The self-inductance of two solenoids A and B having equal length are s

1.	The self-inductance of two solenoids A and B having equal length are same. If the number of turns in two solenoids A and B are 100 and 200 respectively the ratio of the radii of their cross section will be ........
Answer» `2:1` `1:2` `1:4` `4:1` SOLUTION :Here L, `mu_0, l , pi` are same in the EQUATION of self-inductance of solenoids, `L=(mu_0N^2A)/l` `therefore N^2 PROP 1/r^2` `therefore N_2/N_1=r_1/r_2` `therefore (200/100)=r_1/r_2` `therefore r_1/r_2=2/1`

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The self-inductance of two solenoids A and B having equal length are same. If the number of turns in two solenoids A and B are 100 and 200 respectively the ratio of the radii of their cross section will be ........

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