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

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Assertion: Mutual inductance of two coils does not depends on the distance between the coils and their orientation. Reason: It does not depend on the magnetic material filled between the

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

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An inductance and a resistance are connected in series with an AC potential. In this

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

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Explain: You have learnt that plane and convex mirrors produce virtual images of objects. Can they produce real images under some circumstances?

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

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Explain: Does the apparent depth of a tank of water change if viewed obliquely? If so, does the apparent depth increase or

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

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Explain: The refractive index of diamond is much greater than that of ordinary glass. Is this fact of some use to a diamond

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

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A screen is placed 90cm from an object. The image of the object on the screen is formed by a convex lens at two different locations separated by 20cm. Determine the focal length of the

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

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You are given prisms made of crown glass and flint glass with a wide variety of angles. Suggest a combination of prisms which will deviate a pencil of white light without much

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

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Light incident normally on a plane mirror attached to a galvanometer coil retraces backwards as shown in Fig. . A current in the coil produces a deflection of 3.5o of the mirror. What is the displacement of the reflected spot of light on a screen placed 1.5 m

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

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A lens behaves as a converging lens in air and a diverging lens in water (`mu`=4/3). What will be the condition on the value of refractive index (`mu`) of the material of the

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

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You are given two converging lenses of focal length 1.25 cm and 5 cm to design a compound microscope. If it is desired to have a magnification of 30, then find out the separation between the objective and

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

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A ray of light falls on a transparent sphere with centre C as shown in the figure. The ray emerges from the sphere parallel to the line AB. Find the angle of refraction of A if the refractive index of material of sphere is

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

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Write the conditions for observing a rainbow. Show by drawing suitable diagram how one understands the formation of a

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

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A convex lens of focal length `f_1` is kept in contact with a concave lens of focal length `f_2`. Find the focal length of the

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

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A ray of light incident on an equilateral glass prism `(mu_g =sqrt3)` moves parallel to the base line of the prism inside it. Find the angle of incidence for this

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

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The radii of curvature of the faces of a double convex lens are 10 cm and 15 cm. If focal length of the lens is 12 cm, find the refractive index of the material of the

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

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Consider a thin lens placed between a source (S) and an observer (O) (Fig.). Let the thickness of the lens vary as `w(b)=w_0-b^2/a`, where b is the verticle distance from the pole. w0 is a constant. Using Fermat’s principle i.e. the time of transit for a ray between

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

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Explain how Corpuscular theory predicts the speed of light in a medium, say, water, to be greater than the speed of light in vacuum. Is the prediction confirmed by experimental determination of the speed of light in water? If not, which alternative picture of light is consistent with

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

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Answer the following questions: When a low flying aircraft passes overhead, we sometimes notice a slight shaking of the picture on our TV screen. Suggest a possible

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

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Why are coherent sources required to create interference of

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

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