Two waves of identical frequency and amplitude superimpose in the same medium. If they meet perfectly in phase (crest meets crest), the resulting amplitude is: MCQ with Answer and Explanation
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Question #1
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Diamagnetic material susceptibility χ is:
Correct Answer: Option C
Explanation:
Diamagnets: χ ≈ -10⁻⁵ (small negative), weakly repelled by magnetic fields. Paramagnets: small +χ; Ferromagnets: large +χ. Memory tip: 'Diamagnetic: χ < 0, weak repulsion'. Magnetism classification frequently tested in competitive exams.
Diamagnets: χ ≈ -10⁻⁵ (small negative), weakly repelled by magnetic fields. Paramagnets: small +χ; Ferromagnets: large +χ. Memory tip: 'Diamagnetic: χ < 0, weak repulsion'. Magnetism classification frequently tested in competitive exams.
Question #2
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Which of the following materials is diamagnetic in nature?
Correct Answer: Option A
Explanation:
Materials are classified by their magnetic properties. Ferromagnetic materials (Iron, Cobalt, Nickel) are strongly attracted to magnets. Paramagnetic materials (Aluminum, Platinum) are weakly attracted. Diamagnetic materials (Water, Bismuth, Copper, Gold) are actually weakly repelled by a magnetic field because they create an induced magnetic field in opposition to the externally applied one.
Materials are classified by their magnetic properties. Ferromagnetic materials (Iron, Cobalt, Nickel) are strongly attracted to magnets. Paramagnetic materials (Aluminum, Platinum) are weakly attracted. Diamagnetic materials (Water, Bismuth, Copper, Gold) are actually weakly repelled by a magnetic field because they create an induced magnetic field in opposition to the externally applied one.
Question #3
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A ball is dropped from a height of 20 m. Time to reach ground (g=10) is
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