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The true value of dip at a place is 30^(...

The true value of dip at a place is `30^(@)` . The vertical plane carrying needle is turned through `30^(@)` from magnetic meridian . Calculate apparent value of angle of dip .

Text Solution

Verified by Experts

`tan del _(A) = (tan del )/( cos alpha )`
` tan del _(A) = (tan 30^(@))/(cos 30^(@))= ((1)/(sqrt3))/((sqrt3)/(2))`
`tan del _(A) = 2/3`
`del _(A) = tan ^(-1) ((2)/(3)).`
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