RE-NEET2024Physics-Electromagnetic Induction
RE-NEET 2024 Physics Self Inductance MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Let us consider two solenoids A and B, made from same magnetic material of relative permeability μᵣ and equal area of cross-section. Length of A is twice that of B and the number of turns per unit length in A is half that of B. The ratio of self inductances of the two solenoids, Lₐ : Lᵦ is
A
1 : 2
B
2 : 1
C
8 : 1
D
1 : 8
Correct Answer
Option A
Detailed Explanation
The self-inductance L is proportional to the square of the number of turns per unit length and inversely proportional to the length. Calculating gives Lₐ : Lᵦ = 1 : 2.
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