A small creature moves with constant speed in a vertical circle on a bright day. Does its shadow formed by the sun on a horizontal plane move in a simple harmonic motion?

Yes, its shadow on a horizontal plane moves in simple harmonic motion. The projection of a uniform circular motion executes simple harmonic motion along its diameter (which is the shadow on the horizontal plane), with the mean position lying at the centre of the circle.

A small creature moves with constant speed in a vertical circle o…

Write the expression for the de Broglie wavelength associated with a charged particle having charge ‘q’ and mass ‘m’, when it is accelerated by a potential V.

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Write any two examples of diamagnetic substances.

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If the nuclei of masses X and Y are fused together to form a nucleus of mass m and some energy is released, then:

X + Y = m
X + Y < m
X + Y > m
X − Y = m

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Is it possible that the terminal potential difference across the cell be zero? If yes, state the condition.

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Why does a diamond shine more than a glass piece cut to the same shape?

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State the condition under which the terminal pd across a battery and its emf are equal.

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³²P beta-decays to ³²S. Find the sum of the energy of the antineutrino and the kinetic energy of the $\beta$-particle. Neglect the recoil of the daughter nucleus. Atomic mass of ³²P = 31.974u and that of ³²S = 31.972u.

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By what speed do electromagnetic waves travel in vacuum?

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Identify the part of the electromagnetic spectrum to which the following wavelengths belong:

10^-1m
10^-12m

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Under what condition does a biconvex lens of glass having a certain refractive index act as a plane glass sheet when immersed in a liquid?

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