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Mention any two advantages of using alternating current over direct current. Why is hydroelectric power generation more environmentally friendly than thermal power…
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The cost per B.O.T unit of electrical energy is ₹6. Calculate the total cost of electricity used in a month of 30…
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When two conductors are connected in series, the equivalent resistance is 25 Ω, and when connected in parallel, the equivalent resistance is…
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Write two causes of short-sightedness or myopia. Which type of lens is used to correct it? [2+1]
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For the same angle of incidence, the angles of refraction in three different media A, B and C are 30°, 45° and…
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Establish the relationship between radius of curvature (r) and focal length (f) for a convex mirror. Write one use of a concave…
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Define the coefficient of apparent expansion and the coefficient of real expansion of a liquid. Write the relationship between them. [2+1]
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Explain the statement: “The coefficient of linear expansion of iron is 12 × 10⁻⁶ /°C”. Give an example of volume expansion of…
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Heating 200 g of a metallic carbonate produces 112 g of metallic oxide and a gaseous compound. The vapour density of the…
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What mass of KClO₃ needs to be heated to produce the same amount of oxygen as is obtained by heating 216 g…
