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Two positive point charges of 12µc and 8µc are 10 cm apart each other. The work done in bringing them 4cm closer is

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

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The displacement of a charge Q in the electric field `vecE = e_1hat i + e_2 hatj + e_3 hatk` is `vecr = ahati + bhat j` . The work done is

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

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If an electron moves from rest from a point at which potential is 50 volt to another point at which potential is 70 volt, then its kinetic energy in the final state will be

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

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Three charges `Q, + q and + q` are placed at the verticles of a right-angled triangle as shown. The net electrostatic energy of the configuration is zero if Q is equal to

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

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Two electric charges 12µc and –6µc are placed 20cm apart in air. There will be a point P on the line joining these charges and outside the region between them, at which the electric potential is zero. The distance of P from –6µc charge is

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

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In the rectangle, shown below, the two corners have charges `q_1 = –5µc` and `q_2 = +2.0µc` . The work done in moving a charge 3µc from B to A is (`take 1/(4piepsilon_o= 10^(10) Nm^2 '/'c^2`)

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

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4 Points charges each +q is placed on the circumference of a circle of diameter 2d in such a way that they form a square. The potential at the centre is

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

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Three identical charges each of 2µc are placed at the vertices of a triangle ABC as shown in the figure. If AB + AC = 12 cm and AB . AC = `32cm^2` , the potential energy of the charge at A is

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

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A ball of mass 1 gm and charge `10^(–8) c` moves from a point A, where the potential is 600 volt to the point B where the potential is zero. Velocity of the ball of the point B is 20cm/s. The velocity of the ball at the point A will be

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

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Three charges Q, +q and +q are placed at the vertices of an equilateral triangle of side `l` as shown in the figure. It the net electrostatic energy of the system is zero, then Q is

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

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Electric potential at any point is `V = –5x + 3y + sqrt15z` , then the magnitude of the electric field is .....

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

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A small conducting sphere of radius r is lying concentrically inside a bigger hollow conducting sphere of radius R. The bigger and smaller sphere are charged with Q and q (Q > q) and are insulated from each other. The potential difference between the sphers will be

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

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The number of significant figures in 0.06900

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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The sum of the numbers 436.32, 227.2 and 0.301 inappropriate significant figures

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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The mass and volume of a body are 4.237 g and 2.5 `cm^3` , respectively. The density of the material of the body in correct significant figures

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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The numbers 2.745 and 2.735 on rounding off to 3 significant figures will

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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The length and breadth of a rectangular sheet are 16.2 cm and 10.1cm, respectively. The area of the sheet in appropriate significant figures and error

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Which of the following pairs of physical quantities does not have same dimensional

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Measure of two quantities along with the precision of respective measuring instrument is A = 2.5 m s–1 ± 0.5 m s–1 B = 0.10 s ± 0.01 s The value of A B will

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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You measure two quantities as A = 1.0 m ± 0.2 m, B = 2.0 m ± 0.2 m. We should report correct value for `sqrt (AB)`

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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