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A lens behaves as a converging lens in air and a diverging lens in water (`mu`=4/3). What will be the condition on the value of refractive index (`mu`) of the material of the

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(i) Why does the sun appear reddish at sunset or sunrise? (ii) For which colour, the refractive index of prism material is maximum and

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Find the position of the image formed of the object O by the lens combination given in the

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Draw a schematic diagram of refracting telescope. Write its two important

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Use Huygens' principle to verify the laws of

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Unpolarised light of intensity `I` is passed through a polaroid. What is the intensity of the light transmitted by the

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Consider sunlight incident on a slit of width 104 A. The image seen through the slit

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A polariod (I) is placed in front of a monochromatic source. Another polatiod (II) is placed in front of this polaroid (I) and rotated till no light passes. A third polaroid (III) is now placed in between (I) and (II). In this case, will light emerge from (II).

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A small transparent slab containing material of μ = 1.5 is placed along AS2 (Fig.). What will be the distance from O of the principal maxima and of the first minima on either side of the principal maxima obtained in the absence of the glass slab.AC = CO = D, S1C = S2C = d <<

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A particle is dropped from a height H. The de Broglie wavelength of the particle as a function of height is proportional

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Electron and proton are moving with same speed, which will have more

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State Gauss’s Theorem in electrostatics? Using this theorem define an expression for the field intensity due to an infinite plane sheet of change of charge density σ C/`m^2`

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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The spatial distribution of electric field due to charges (A, B) is shown in figure. Which one of the following statements is correct

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Given a cube with point charges q on each of its vertices. Calculate the force exerted on any of the charges due to rest of the 7

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Calculate the electric field intensity E which would be just sufficient to balance the weight of an electron. If this electric field is produced by a second electron located below the first one what would be the distance between them? [Given : `e=1.6 × 10^(-19) C, m = 9.1 × 10^(–31) kg and g = 9.8

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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If =`–5x + 3y +sqrt15z` then find magnitude of electric field at point

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An isolated conducting sheet of area A and carrying a charge Q is placed in a uniform electric field E, such that electric field is perpendicular to sheet and covers all the sheet. Find out charges appearing on its two surfaces.

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A charge Q is divided into two parts and then they are placed at a fixed distance. The force between the two charges is always maximum when the charges are

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Two uniformaly charged spherical conductors A and B having radius 1mm and 2mm are separated by a distance of 5 cm. If the spheres are connected by a conducting wire then in equilibrium condition, the ratio of the magnitude of the electric fields at the surfaces of spheres A and B is

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At what angle θ a point P must be located from dipole axis so that the electric fieldintensity at the point is perpendicular to the dipole axis

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