Electro Magnetic Induction And Alternating Currents Question 563

Question: When the number of turns and the length of the solenoid are doubled keeping the area of cross-section same, the inductance [CBSE PMT 1993; MH CET 2000]

Options:

A) Remains the same

B) Is halved

C) Is doubled

D) Becomes four times

Show Answer

Answer:

Correct Answer: C

Solution:

$ L={\mu_{0}}\frac{N^{2}}{l}A $ . When N and l are doubled. L is also doubled.



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