Question:
A dip needle arranged to move freely in the magnetic meridian dips by an angle $\theta$. If the vertical plane in which the needle moves is rotated through an angle $\alpha$ to the magnetic meridian, then the needle will dip by an angle
A dip needle arranged to move freely in the magnetic meridian dips by an angle $\theta$. If the vertical plane in which the needle moves is rotated through an angle $\alpha$ to the magnetic meridian, then the needle will dip by an angle
Updated On: Jun 23, 2023
- $\theta$
- $\alpha$
- more than $\theta$
- less than $\theta$
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The Correct Option is C
Solution and Explanation
In this question, $\cos \alpha<1$
i.e., $\frac{1}{\cos \alpha}>1$
or, $\frac{\tan \theta '}{\tan \theta}>1$
or, $\tan \theta ' > \tan \theta$
or, $\theta ' >\theta$
ie, angle of apparent dip is more than angle of actual dip $\theta$.
i.e., $\frac{1}{\cos \alpha}>1$
or, $\frac{\tan \theta '}{\tan \theta}>1$
or, $\tan \theta ' > \tan \theta$
or, $\theta ' >\theta$
ie, angle of apparent dip is more than angle of actual dip $\theta$.
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Concepts Used:
Magnetism & Matter
Magnets are used in many devices like electric bells, telephones, radio, loudspeakers, motors, fans, screwdrivers, lifting heavy iron loads, super-fast trains, especially in foreign countries, refrigerators, etc.
Magnetite is the world’s first magnet. This is also called a natural magnet. Though magnets occur naturally, we can also impart magnetic properties to a substance. It would be an artificial magnet in that case.
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Some of the properties of the magnetic field lines are:
- The lines and continuous and outside the magnet, the field lines originate from the North pole and terminate at the South pole
- They form closed loops traversing inside the magnet.
- But here the lines seem to originate from the South pole and terminate at the North pole to form closed loops.
- More number of close lines indicate a stronger magnetic field
- The lines do not intersect each other
- The tangent drawn at the field line gives the direction of the field at that point.