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If a charged spherical conductor of radius 10cm has potential v at a point distant 5 cmfrom its centre, then the potential at a point distant 15cm from the centre will be

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

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Electric charges of `+10µc, 5µc, –3µc and 8µc` are placed at the corners of a square of side `sqrt2`m the potential at the centre of the square is

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

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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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Some of the most profound statements on the nature of science have come from Albert Einstein, one of the greatest scientists of all time. What do you think did Einstein mean when he said : “The most incomprehensible thing about the world is that it is

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

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“Every great physical theory starts as a heresy and ends as a dogma”. Give some examples from the history of science of the validity of this incisive

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

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“Politics is the art of the possible”. Similarly, “Science is the art of the soluble”. Explain this beautiful aphorism on the nature and practice of

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

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Though India now has a large base in science and technology, which is fast expanding, it is still a long way from realising its potential of becoming a world leader in science. Name some important factors, which in your view have hindered the advancement of science in

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

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No physicist has ever “seen” an electron. Yet, all physicists believe in the existence of electrons. An intelligent but superstitious man advances this analogy to argue that ‘ghosts’ exist even though no one has ‘seen’ one. How will you refute his argument

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

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The shells of crabs found around a particular coastal location in Japan seem mostly to resemble the legendary face of a Samurai. Given below are two explanations of this observed fact. Which of these strikes you as a scientific explanation ? (a) A tragic sea accident several centuries ago drowned a young Samurai. As a tribute to his bravery, nature through its inscrutable ways immortalised his face by imprinting it on the crab shells in that area. (b) After the sea tragedy, fishermen in that area, in a gesture of honour to their dead hero, let free any crab shell

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

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