MHT CET · Physics · Electromagnetic Induction
When the number of turns in a coil are made 3 times without any change in the length of the coil, its self inductance becomes
- A (1.5) times
- B two times
- C three times
- D nine times
Answer & Solution
Correct Answer
(D) nine times
Step-by-step Solution
Detailed explanation
- Formula: Self-inductance \(L\) of a coil is proportional to the square of the number of turns ( \(N^2\) ).
- Calculation: If the number of turns \(N\) is tripled, the new self-inductance becomes \((3 N)^2=\) \(9 N^2\). This means the self-inductance becomes nine times the original.
- Calculation: If the number of turns \(N\) is tripled, the new self-inductance becomes \((3 N)^2=\) \(9 N^2\). This means the self-inductance becomes nine times the original.
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