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Two solenoids with equal turns and lengths and radii in ratio 1:3: ratio of self-inductances

The same question, asked 2 times: 15 May 2023 S1, 15 Apr 2026 S2. Every wording below, oldest first.

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  1. Question 1

    15 May 2023 S1

    31
    Two solenoids of equal number of turns have their lengths as well as radii in the same ratio 1:3. The ratio of their self inductance will be

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  2. Question 2

    15 Apr 2026 S2

    136
    Two solenoids A and B of equal number of turns have their lengths and radii in the same ratio 1:31 : 3. The ratio of the self-inductance of solenoid A to that of B will be

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