Electro Magnetic Induction And Alternating Currents Question 591

Question: An air core solenoid has 1000 turns and is one metre long. Its cross-sectional area is 10 cm2. Its self inductance is [JIPMER 2002]

Options:

A) 0.1256 mH

B) 12.56 mH

C) 1.256 mH

D) 125.6 mH

Show Answer

Answer:

Correct Answer: C

Solution:

$ L=\frac{{\mu_{0}}N^{2}A}{l}=\frac{4\pi \times {{10}^{-7}}\times {{(1000)}^{2}}\times 10\times {{10}^{-4}}}{1} $ =1.256 mH



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