Recent questions in Physics

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A particle of mass \(m\) and charge \(q\) is placed at rest in a uniform electric tired \(E\) and then released. The kinetic energy attained by the particle after moving a distance \(\mathrm{y}\), is

asked Dec 18, 2021 in Kinematics by kritika (90.1k points)

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An infinite line charge produces a field of \(9 \times 10^{4} \mathrm{~N} / \mathrm{C}\) at a distance of \(2 \mathrm{~cm}\). Calculate the linear charge density.

asked Dec 18, 2021 in Kinematics by kritika (90.1k points)

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A convex mirror of focal length f forms an image \(\frac{1}{n^{\text {th }}}\) of the size of the object. The distance of the object from the mirror is

asked Dec 18, 2021 in Kinematics by kritika (90.1k points)

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What do you mean by dynamic strength and static strength?

asked Dec 18, 2021 in Kinematics by kritika (90.1k points)

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Mention any three assumptions of kinetic theory of gases.

asked Dec 18, 2021 in Kinematics by kritika (90.1k points)

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A particle of mass 0.3 kg is subjected to a force F = - k x with k = 15 N/m. What will be its initial acceleration if it is released from a point x = 20 cm ?

asked Dec 17, 2021 in Kinematics by kritika (90.1k points)

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Define refractive index.

asked Dec 17, 2021 in Kinematics by kritika (90.1k points)

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State the reason for the following

asked Dec 17, 2021 in Kinematics by kritika (90.1k points)

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The optical phenomena, twinkling of stars, is due to

asked Dec 17, 2021 in Kinematics by kritika (90.1k points)

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Refractive index of water with respect to air is 1.33 and that of diamond is 2.42.

asked Dec 17, 2021 in Kinematics by kritika (90.1k points)

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Derivation of the Second Equation of Motion.

asked Dec 17, 2021 in Kinematics by kritika (90.1k points)

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Diode is used as a/an

asked Dec 17, 2021 in Kinematics by kritika (90.1k points)

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The op amp can amplify

asked Dec 17, 2021 in Kinematics by kritika (90.1k points)

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Which of the following has the dimension of \(\mathrm{ML}^{0} \mathrm{~T}^{-2}\) ?

asked Dec 14, 2021 in Kinematics by kritika (90.1k points)

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A small steel ball bounces on a steel plate held horizontally. On each bounce the speed of the ball arriving at the plate is reduced by a factor e (coefficient of restitution) in the rebound, so that $$ \mathrm{V}_{\text {upward }}=\mathrm{eV}_{\text {downward }} $$ If the ball is initially dropped from a height of \(0.4 \mathrm{~m}\) above the plate and if 10 seconds later the bouncing ceases, he value of \(e\) is

asked Dec 14, 2021 in Kinematics by kritika (90.1k points)

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Let \(v_{n}\) and \(E_{n}\) be the respective speed and energy of an electron in the horbit of radius \(r_{n}\), in a hydrogen atom, as predicted by Bohr's model. Then

asked Dec 14, 2021 in Kinematics by kritika (90.1k points)

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If \(\chi\) stands for the magnetic susceptibility of a substance,for its magnetic permeability and \(\mu_{0}\) for the permeability of free space, then

asked Dec 14, 2021 in Kinematics by kritika (90.1k points)

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If the pressure, temperature and density of an ideal gas are denoted by \(\mathrm{P}, \mathrm{T}\) ancespectively, the velocity of sound in the gas is

asked Dec 14, 2021 in Kinematics by kritika (90.1k points)

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A bullet of mass \(4.2 \times 10^{2} \mathrm{~kg}\), moving at a speed of \(300 \mathrm{~ms}\), gets stuck into a block with a mass 9 times that of th bullet. If the block is free to move without any kind of friction, the heat generated in the process will be

asked Dec 14, 2021 in Kinematics by kritika (90.1k points)

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A block of mass \(1 \mathrm{~kg}\) starts from rest at \(\mathrm{x}=0\) and moves along the \(\mathrm{x}\)-axis under the action of a force \(\mathrm{F}=\mathrm{kt}\), where is time and \(k=1 \mathrm{Ns}^{-1}\). The distance the block will travel in 6 seconds is

asked Dec 14, 2021 in Kinematics by kritika (90.1k points)

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