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
