Question

Self induction of a solenoid is

• A. Directly proportional to current flowing through the coil
• B. Directly proportional to its length
• C. Directly proportional to area of cross-section
• D. Inversely proportional to area of cross-section

Answer 1

Answer: (C)

Directly proportional to area of cross-section

Answer 2

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