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Two identically charged spheres are suspended by strings of equal length. The strings make an angle of 300 with each other. When suspended in a liquid of density 0.8 g/cc the angle remains same. What is the dielectric constant of liquid. Density of sphere = 1.6

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

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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

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

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Five point charges, each of value +q are placed on five vertices of a regular hexagon of side Lm. What is the magnitude of the force on a point charge of value –q coulomb placed at the centre of the

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

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Calculate the electric field at origin due to infinite number of charges as shown in figures

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A charged particle is kept in equilibrium in the electric field between the plates of millikan oil drop experiment. If the direction of the electric field between the plates is reversed, then calculate acceleration of the charged

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

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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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A block having mass `m = 4 kg` and charge `q=50 muC` is connected to a spring having a force constant `k=100 N'/'m`. The block lies on a frictionless horizontal track and a uniform electric field `E=5×10^5` V/m acts on the system as shwon in figure. The block is released from rest when the spring is unstretched (at `x = 0`) (a) By what maximum amount does the spring expand? (b) What is the equilibrium position of the block? (c) Show that the block's motion is simple harmonic and determine the amplitude and time period of the

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

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If a point charge q is placed at the centre of a cube. What is the flux linked (a) with the cube? (b) with each face of the

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

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If a point charge q is placed at one corner of a cube, what is the flux linked with the

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

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For infinite line distribution of charge draw the curve between log E and log

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A point charge of `0.009 muC` is placed at origin. Calculate intensity of electric field due to this point charge at point `(sqrt2,

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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Calculate force on a dipole in the surrounding of a long charged wire as shown in the

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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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A proton moves with a speed of `7.45×10^5 m'/'s` directly towards a free proton originally at rest. Find the distance of closest approach for the two protons. Given : `1/(4pi epsilon_0)= 9×10^9 (N-m)^2/c^2 ; m_p=1.67×10^(–27) kg and e = 1.6×10^(–19)

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

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A system has two charges `q_A=2.5×10^(–7) C and q_B = – 2.5 × 10^(–7) C` located at points `A: (0, 0, – 0.15 m) and B ; (0, 0, + 0.15 m)` respectively. What is the total charge and electric dipole moment of the

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

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