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

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A square surface of side L metres is in the plane of uur the paper. A uniform electric field `vecE ('volt' /m)`, also in the plane of the paper, is limited only to the lower half of the square surface (see figure). The electric flux in SI units associated with the surface is

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

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A thin semi-circular ring of radius r has a positive charge q distributed uniformly overit. The net electric field `vecE` at the centre O

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

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Two positive ions, each carrying a charge q, are separated by a distance d. If F is the force of repulsion between the ions, the number of electrons missing from each ion will be (e being the charge of an

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

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When a piece of polythene is rubbed with wool, a charge of `–2×10^(–7) C` is developed on polythene. What is the amount of mass, which is transferred to

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

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`10^(12) alpha` – particles (Nuclei of helium) per second falls on a neutral sphere, calculate time in which sphere gets charged by

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

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If the distance between two equal point charges is doubled and their individual charges are also doubled, what would happen to the force between

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

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As shown in figure a closed surface intersects a spherical conductor. If a negative charge is placed at point P. What is the nature of the electric flux coming out of the closed surface

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

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Consider `vecE=3×10^3 hati` (N/C) then what is the flux through the square of 10 cm side, if the normal of its plane makes 60° angle with the X

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

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Find the electric field due to an infinitely long cylindrical charge distribution of radius R and having linear charge density `lambda` at a distance half of the radius from its

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

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A charge `2muC` is taken from infinity to a point in an electric field, without changing its velocity, if work done against electrostatic forces is `–40muJ` then potential at that point is

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

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`1muC` charge is shifted from A to B and it is found that work done by external force is `80muJ` against electrostic forces, find `V_A –

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

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The variation of potential with distance x from a fixed point is shown in figure. Find the magnitude of the electric field (in `V'/'m`) at `x

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

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The energy density u is plotted against the distance r from the centre of a spherical charge distribution on a log-log scale. Find the magnitude of slope of obtianed straight

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

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Six charges are kept at the vertices of a regular hexagon as shown in the figure. If magnitude of force applied by +Q on +q charge is F, then net electric force on the +Q is nF. Find the value of n.

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

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Electric field in a region is given by `vecE=-4xhati+6yhatj`. The charge enclosed in the cube of side 1m oriented as shown in the diagram is given by `alphaepsilon_0` . Find the value of

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

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When a Piece of Polythene is rubbed with wool, a charge of `–2xx 10^(-7)` is developed on polythene. The mass transferred to polythene is .....

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

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The protonic charge in 100 gm of water is ..........

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

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A copper sphere of mass 2 gm contains about `2xx 10^(22)` atoms. The charge on the nucleus of each atom is 29e. The fraction of electrons

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

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The rate of alpha partical falls on neutral spheare is `10^(12)` per second. The time in which sphere gets charged by 2µc is .........

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

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