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Syllabus for chapter-2 cbse 2020-22 Electric potential and Capacitance

asked Sep 3, 2022 in 12th Physics by varun (6.7k points)

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A great physicist of this century (P.A.M. Dirac) loved playing with numerical values of Fundamental constants of nature. This led him to an interesting observation. Dirac found that from the basic constants of atomic physics (c, e, mass of electron, mass of proton) and the gravitational constant G, he could arrive at a number with the dimension of time. Further, it was a very large number, its magnitude being close to the present estimate on the age of the universe (~15 billion years). From the table of fundamental constants in this book, try to see if you too can construct

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

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An object 2 cm tall is placed on the axis of a convex lens of focal length 5 cm at a distance of 10 cm from the optical centre of the lens.

asked Jun 11, 2022 in 10th science by varun (6.7k points)

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The magnification produced by a spherical lens is +0.75.

asked Jun 11, 2022 in 10th science by varun (6.7k points)

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Focal length of concave lens is_______

asked Jun 11, 2022 in 10th science by varun (6.7k points)

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The lens A produces a magnification of –0.6 whereas lens B produces magnification of +0.6.

asked Jun 11, 2022 in 10th science by varun (6.7k points)

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An object 5 cm high is held 25 cm away from a converging lens of focal length 10 cm.

asked Jun 11, 2022 in 10th science by varun (6.7k points)

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Draw ray diagrams for all possible cases ray for a convex lens.

asked Jun 11, 2022 in 10th science by varun (6.7k points)

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In the previous quesion

asked Jun 11, 2022 in 10th science by varun (6.7k points)

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A convex lens of focal length 10 cm is placed at a distance of 12 cm from a wall.

asked Jun 11, 2022 in 10th science by varun (6.7k points)

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What is reflection of light?

asked Jun 11, 2022 in 10th science by varun (6.7k points)

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State laws of reflection

asked Jun 11, 2022 in 10th science by varun (6.7k points)

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Write lens formula?

asked Jun 11, 2022 in 10th science by varun (6.7k points)

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Focal length of converging lens is_______

asked Jun 11, 2022 in 10th science by varun (6.7k points)

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Write formula of magnification for lens.

asked Jun 11, 2022 in 10th science by varun (6.7k points)

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The temperatures of two bodies measured by a thermometer are `t_1 = 20 ^0C ± 0.5 ^0C` and `t_2 = 50 ^0C ± 0.5 ^0C`. Calculate the temperature difference and the error their

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

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A school has 8 periods a day each of 45 minutes duration. How long would each period be, if the school has 9 periods a day, assuming the number of school hours to be the

asked Jan 17, 2022 in 8th-maths by vaibhav (1.7k points)

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What Are Spores? Give Definition & Types?

asked Mar 30, 2022 in 10th science by varun (6.7k points)

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A square conducting loop is placed in the time varying magnetic field `((dB)/(dt)=+'ve constant')`.The centre of square coincides with axis of cylindrical region of magnetic field. The directions of induced electric field at point a, b and c.Consider a conducting circular loop placed in a magnetic field as shown in figure. When magnetic field changes with time, magnetic flux also changes and emf `e=-(dphi)/(dt)` is induced. If resistance of loop is R then induced current is `i=e/R`. For current, charges must have non–zero average velocity. Magnetic force cannot make the stationary charges to move. Actually there is an induced electric

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

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A flask contains argon and chlorine in the ratio of 2:1 by mass. The temperature of the mixture is 27 °C. Obtain the ratio of (i) average kinetic energy per molecule, and (ii) root mean square speed vrms of the molecules of the two gases. Atomic mass of argon = 39.9 u; Molecular mass of chlorine = 70.9 u. Example

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

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