Electro Magnetic Induction And Alternating Currents Question 575
Question: The inductance of a solenoid 0.5 m long of cross-sectional area 20 cm2 and with 500 turns is [AMU (Med.) 2000]
Options:
A) 12.5 mH
B) 1.25 mH
C) 15.0 mH
D) 0.12 mH
Show Answer
Answer:
Correct Answer: B
Solution:
$ L=\frac{{\mu_{0}}N^{2}A}{l}=\frac{4\pi \times {{10}^{-7}}\times {{( 500 )}^{2}}\times 20\times {{10}^{-4}}}{0.5} $ =1.25mH
