Question

At a certain place the angle of dip is 30° and the horizontal component of earth's magnetic field is 0.5 G The earth's total magnetic field (in G), a that certain place, is ______.

Options

• `1/sqrt3`

• `1/2`

• `sqrt3`

• 1

Answer 1

At a certain place the angle of dip is 30° and the horizontal component of earth's magnetic field is 0.5 G The earth's total magnetic field (in G), a that certain place, is `bb(1/sqrt3)`.

Explanation:

We have

B_H = B_e cos θ, θ = angle of Dip

B_e = B_H sec θ = (0.5 sec 30)G

= `(0.5xx2/sqrt3)"G"`

= `"G"/sqrt3`