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JEE PHYSICS MCQ: MAGNETISM AND MATTER

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A dip needle vibrates in the vertical plane perpendicular to magnetic meridian. The time period of vibration is found to be 2 s. The same needle is then allowed to vibrate in the horizontal plane and time period is again found to be 2s. Then the angle of dip is

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Correct option: C

45

^ \circ

Option C (45

^ \circ

) is correct because the time periods are equal, implying the horizontal and vertical components of the magnetic field are equal.

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Curie temperature is the one above which A vibration magnetometer consists of two identical bar magnets placed one over the other such that they are perpendicular and bisect each other. The time period of oscillation in a horizontal magnetic field is

{2^{5/4}}

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\mu_{\mathrm{d}}, \mu_{\mathrm{p}}

\mu_{\mathrm{f}}

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