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The length of a solenoid is 0.1m and its...

The length of a solenoid is `0.1m` and its diameter is very small . A wire is wound over in two layers. The number of turns in the inner layer is 50 and that on the outer layer is 40. The strength of current flowing in two layers in the same direction is 3 ampere. The magnetic induction in the middle of the solenoid will be

A

`3.4 xx 10^(-3) T`

B

`3.4 xx 10^(-3) ` gauss

C

`3.4 xx 10^3 T`

D

`3.4 xx 10^3` gauss

Text Solution

Verified by Experts

The correct Answer is:
A
`B = mu_0 "ni"`
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Knowledge Check

  • A long solenoid has 800 turns per metre length of solenoid. A current of 1.6 A flows through it. The magnetic induction at the end of the solenoid on its axis is

    A
    `16xx10^(-4)T`
    B
    `8xx10^(-4)T`
    C
    `32xx10^(-4)T`
    D
    `4xx10^(-4)T`

  • A long solenoid has 800 turns per metre length of solenoid A current of 1.6 A flow through it. The magnetic induction at the end of the solenoid on its axis is

    A
    `16 xx 10^(-4)` tesla
    B
    `8 xx 10^(-4)` tesla
    C
    `32 xx 10^(-4)` tesla
    D
    `4 xx 10^(-4)` tesla

  • Two solenoids of equal number of turns have their lengths and the radii in the same ratio 1:4. The ratio of their self inductances will be

    A
    `1:2`
    B
    `2:1`
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    D
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