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When the number of turns and the length ...

When the number of turns and the length of the solenoid are doubled keeping the area of cross-section same, the inductance

A

remains the same

B

is halved

C

is doubled

D

becomes four times

Text Solution

Verified by Experts

The correct Answer is:
C
`L=mu_(0)(N^(2))/(l)A.` when `N` and `l` are doubled. `L` is also doubled.
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Knowledge Check

  • In a given solenoid if the number of turns and the length of the solenoid are doubled keeping the area of cross-section same, then it's inductance:

    A
    Remains the same
    B
    Is halved
    C
    Is doubled
    D
    Becomes foru times

  • If both the number of turns and core length of an inductor is doubled keeping other factors constant, then its self-inductance will be:

    A
    Unaffected
    B
    Doubled
    C
    Halved
    D
    Quadrupled

  • When length of a metal wire is doubled and area of cross-section is reduced to half then the resistance will be

    A
    Double
    B
    Four times
    C
    No change
    D
    Half

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