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A long solenoid has 200 turns per cm and...

A long solenoid has 200 turns per cm and carries a current of 2.5 amps. The magnetic field at its centre is `(mu_(0)=4pixx10^(-7)"weber"//amp-m)`

A

`3.14xx10^(-2)"weber"//m^(2)`

B

`6.28xx10^(-2)"weber"//m^(2)`

C

`9.42xx10^(-2)"weber"//m^(2)`

D

`12.56xx10^(-2)"weber"//m^(2)`

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • A long solenoid has 200 turns per cm and carries a current of 2.5A. The magnetic field at its centre is

    A
    `3.14xx10^-2Wb//m^2`
    B
    `6.28xx10^-2Wb//m^2`
    C
    `9.42xx10^-2Wb//m^2`
    D
    `12.56xx10^-2Wb//m^2`

  • A long solenoid has 200 turns/cm and carries a current of 2.5 A. The magnetic field at its centre is ("Give "mu_(0)=4pixx10^(-7)("Weber")/("Amp-meter"))

    A
    `3.14xx10^(-2)Wb//m^(2)`
    B
    `6.28xx10^(-2)Wb//m^(2)`
    C
    `9.42xx10^(-2)Wb//pir^(2)`
    D
    `12.56xx10^(-2)Wb//m^(2)`

  • A long solenoid has 200 turns per cm and carries a current of 2.5 A. The magnetic field at the centre is (mu_(o) = 4 pi xx 10^(-7) Wb//m - A)

    A
    `5.41 xx 10^(-3) Wb//m^(2)`
    B
    `6.28 xx 10^(-2) Wb//m^(2)`
    C
    `2.2 xx 10^(-4) Wb//m^(2)`
    D
    None of these

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