Question

When the number of turns and the length of the solenoid are doubled keeping the area of cross-section same, the inductance

• A. Remains the same
• B. Is halved
• C. Is doubled
• D. Becomes four times

Answer 1

Answer: (C)

Is doubled

Answer 2

$L = \mu_{0}\frac{N^{2}}{l}A$.

When N and l are doubled. L is also doubled.