A long solenoid has 20 turns per cm and ...

A long solenoid has 20 turns per cm and carries a current i. the magnetic field at its centre is `6.28xx10^(-2)Wb//m^(2)`. Another long solenoid has 100 turns per cm and it carries a current `i//3` . The value of the magnetic field at its centre is

`1.05 xx 10^(-4) Wb//m^2`

`1.05 xx 10^(-2) Wb//m^2`

`1.05 xx 10^(-5) Wb//m^2`

`1.05 xx 10^(-6) Wb//m^2`

Verified by Experts

The correct Answer is:

`B = mu_0 "ni"`

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A long solenoid has 200 turns per cm and carries a current 1. The magnetic field at its centre is 6.28 xx 10^(-2) Wb m^(-2) . Another long solenoid has 100 turns per cm and it carries a current 7"/"3 . The value of the magnetic field at its centre is

`1.05xx10^(-4)Wbm^(-2)`

`1.05xx10^(-2)Wbm^(-2)`

`1.05xx10^(-5)Wbm^(-2)`

`1.05xx10^(-3)Wbm^(-2)`

`1.05 xx 10^(-2) Weber//m^(2)`

`1.05 xx 10^(-5) Weber//m^(2)`

`1.05 xx 10^(-3) Weber//m^(2)`

`1.05 xx 10^(-4) Weber//m^(2)`

`3.14xx10^-2Wb//m^2`

`6.28xx10^-2Wb//m^2`

`9.42xx10^-2Wb//m^2`

`12.56xx10^-2Wb//m^2`