MHT CET 2023 Physics question

Self-inductance of solenoid is

(A)directly proportional to current flowing through the coil
(B)directly proportional to the length
(C)directly proportional to its area of cross-sectionCorrect
(D)inversely proportional to the area of cross-section

Answer: (C)

Solution

The self-inductance of a long solenoid with turns, length and cross-sectional area is . It depends only on the geometry and the core material, not on the current, so option (a) is

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Question ID VK-094682