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A ship is sailing due west according to ...

A ship is sailing due west according to Mariner's compass. If the declination of the plane is `15^@` east, what is the true direction of ship?

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The correct Answer is:
`75^@` west of north
As is clear from figure, magnetic NS is `15^@` east of geographic NS. As ship is sailing due west according to Mariner's compass, it is going `(90^@-15^@)=75^@` west of (geographic) north.
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PRADEEP-MAGNETIC EFFECT OF CURRENT AND MAGNETISM-Exercise
  1. A compass needle whose magnetic moment is 60Am^2 points geographic nor...

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  2. A magnetic needle free to rotate in a vertical plane parallel to magne...

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  3. A ship is sailing due west according to Mariner's compass. If the decl...

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  4. The declination at a place is 20^@ west. In what direction should a sh...

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  5. The true dip at a place is 30^@. In what plane is the dip apparently 6...

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  6. The true value of dip at a place is 45^@. If the vertical plane carryi...

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  7. If theta1 and theta2 be the apparent angles of dip observed in two ver...

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  8. A magnetic needle is free to rotate in a vertical plane which makes an...

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  9. At 45^@ to magnetic meridian, the apparent dip is 30^@. What is the tr...

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  10. A ship sails due east according to compass. If declination at that pla...

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  11. A bar magnet of length 10cm is placed in the magnetic meridian with it...

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  12. A very short bar magnet has magnetic moment 1*4175JT^-1. It is placed ...

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  13. A bar magnet 30cm long is placed in magnetic meridian with its north p...

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  14. A short bar magnet of magnetic moment 0*5JT^-1 is placed with its magn...

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  15. A neutral point is found on the axis of a bar magnet at a distance of ...

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  16. The magnetic needle of a tangent galvanometer is deflected at an angle...

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  17. Two tangent galvanometers, A and B have their number of turns in the r...

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  18. Two tangent galvanometers differ only in the matter of number of turns...

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  19. Two tangent galvanometers have coils of the same radii, differing only...

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  20. A 2 turn coil of radius 10cm is placed with its plane in magnetic meri...

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