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At a place, the value of H and V are 0.4...

At a place, the value of H and V are `0.4 xx 10^(-4)` tesla and `0.3 xx 10^(-4)` tesla, respectively. The resultant of Earth's magnetic field is

A

`0.5 xx 10^(-4)T`

B

`10^(-4)T `

C

`2 xx 10^(-4)T`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
A
The resultant of earth.s magnetic field,
`B = sqrt(B_H^2 + B_V^2)`
`B = sqrt((0.4 xx 10^(-4))^2 + (0.3 + 10^(-4))^2)`
` = sqrt(0.25 xx (10^(-4))^2) = 0.5 xx 10^(-4) T`
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