Recent questions tagged chapter2

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The figure shows four situations in which charges as indicated `(q > 0)` are fixed on an axis. How many situations is there a point to the left of the charges where an electron would be in

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

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An electric field is given by `vecE=(yhati+xhatj)N/C`. Find the work done (in J) in moving a 1C charge from `vecr_A=(2hati+2hatj)m` to

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

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The arrangement shown consists of three elements. (i) A thin rod of charge `–3.0 muC` that forms a full circle of radius 6.0 cm. (ii) A second thin rod of charge `2.0 muC` that forms a circular arc of radius 4.0 cm and concentric with the full circle, subtending an angle of 90° at the centre of the full circle. (iii) An electric dipole with a dipole moment that is perpendicular to a radial line and has magnitude `1.28 × 10^(–21)C-m.` Find the net electric potential in volts at the

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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An infinite plane of charge with `sigma=2epsilon_0''C/ m^2`is tilted at a 37° angle to the vertical direction as shown below. Find the potential difference, `V_A–V_B` in volts, between points A and B at 5 m distance apart. (where B is vertically above

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 ..........

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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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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

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

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Two point charges repel each other with a force of 100 N. One of the charges is increased by 10% and other is reduced by 10%. The new force of repulsion at the same distance would be ........

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

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Given that `q_1 + q_2 = q` if the between `q_1` and `q_2` is maximum, `q_1/q`

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

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Two small conducting sphere of equal radius have charges +1µc and – 2µc respectively and placed at a distance d from each other experience force F1 . If they are brought in contact and separated to the same distance, they experience force F2 . The ratio of F1 to F2 is

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

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Three charges, each of value Q, are placed at the vertex of an equilateral triangle. A fourth charge q is placed at the centre of the triangle. If the charges remains stationery then, q =

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

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Tw o small charged spheres repal each other with a force `2 xx10^(-3) N` . The charge on one sphere is twice that of the other. When these two spheares displaced 10 cm further apart the force is `5xx 10^(-4) N` , then the charges on both the spheres are

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

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Three charges –`q_1 , + q_2 `and `–q_3` are placed as shown in figure. The x component of the force on –q1 is proportional to

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

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Two equal negative charges –q are fixed at points (o, a) and (o, –a). A positive charge Q is released from rest at the point (2a, o) on the X - axis. The charge Q will

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

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Four charges, each equal to –Q, are placed at the corners of a square and a charge +q isplaced at its centre. If the system is in equilibrium, the value of q is

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

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For the system shown in figure, if the resultant force on q is zero, then Q =

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

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