If the number of turns per units length of a coils of solenoid is doubled , the self- inductance of the soleniod will
If the number of turns per units length of a coils of solenoid is doubled , the self- inductance of the soleniod will
A. remain unchanged
B. be halved
C. be doubled
D. become four times
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Correct Answer - D
Slef inductance of a soleonoid `=mu_(0)n^(2)Al`
when n is the number of turns per length
`:.` Self inductance is directely proptional to `n^(2)`. Self inductance becones 4 times whenn is doubled
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