MHT CET 2023 Physics question

The self inductance 'L' of a solenoid of length 'l' and area of cross-section 'A', with a fixed number of turns 'N' increases as

Answer: (B)

Solution

The self-inductance of a long solenoid is . For a fixed number of turns , . So increases when the area increases and the length decreases

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Question ID VK-096351