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The magnetic needle of a tangent galvano...

The magnetic needle of a tangent galvanometer is deflected at an angle `30^(@)` due to a magnet. The hoeizontal component of earth's magnetic field `0.34xx10^(-4)T` is along the plane of the coil. The magnetic intensity is

A

`1.96xx10^(-4)T`

B

`1.96xx10^(-5)T`

C

`1.96xx10^(4)T`

D

`1.96xx10^(5)T`

Text Solution

Verified by Experts

The correct Answer is:
B
`B=B_(H) tan theta`
`=0.34xx10^(-4) tan 30^(@) =1.96xx10^(-5)T`
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Knowledge Check

  • The angle of dip at a certain place is 30^(@) . If the horizontal component of the earth's magnetic field is H, the intensity of the total magnetic field is

    A
    `H/2`
    B
    `(2H)/sqrt(3)`
    C
    `Hsqrt(2)`
    D
    `Hsqrt(3)`

  • At certain place, the horizontal component of earth's magnetic field is 3.0G and the angle dip at the place is 30^(@) . The magnetic field of earth at that location

    A
    4.5G
    B
    5.1G
    C
    3.5G
    D
    6.0G

  • The horizontal component of the earth's magnetic field is 0.22 Gauss and total magnetic field is 0.4 Gauss. The angle of dip. Is

    A
    `tan^(-1)(1)`
    B
    `tan^(-1)(oo)`
    C
    `tan^(-1)(1.518)`
    D
    `tan^(-1)(pi)`
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