Question : When several turns in a coil are tripled, without any change in the length of the coil, its self-inductance becomes:
Option 1: Nine times
Option 2: Three times
Option 3: Six times
Option 4: One-third
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Correct Answer: Nine times
Solution : The correct answer is Nine times.
Any conducting coil's ability to resist changes in current flow is known as self-inductance. A solenoid's self-inductance increases by nine times when the number of turns in the coil triples without any change in the coil's length. The coil's self-inductance is directly proportional to the square of the number of turns. The formula for the self-inductance (L) of a coil is L= μ⋅N2⋅A/ l.
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