JEE · NEET Previous Year Question
If the number of turns per unit length of a coil of solenoid is doubled, the self‐ inductance of the solenoid will
Topic: NEET PYQ
Answer: D. Full step-by-step solution below.
- Aremain unchanged
- Bbe halved
- Cbe doubled
- Dbecome four times
Correct answer: D
Solution
(d) Self inductance of a solenoidwhere is the number of turns/length.
So, self-induction
So, inductance becomes 4 times when is doubled.
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