Who are the stakeholders for a forest ?
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An electric heater is rated at 2 kW. Electrical energy costs Rs 4 per kWh. What is the cost of using the heater for 3 hours ? (a) Rs 12 (b) Rs 24 (c) Rs 36 (d) Rs 48
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What is meant by the 'angle of incidence' and the 'angle of refraction' for a ray of light ? Draw a labelled ray diagram to show the angle of incidence and the angle of refraction for a refracted ray of light.
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For an inverted image, the sign convention of the height of the image is ___ .
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What happens when a ray of light passes through the optical centre of a lens?
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Long question (5) What will you do for the sustainable management of natural resource?
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1.Material Suitable for making permanent magnet is: a) Steel b) Iron c) copper d) aluminium
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Why do we use tungsten filament in bulb or lamps ? [2 MARKS]
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Show how you would connect three resistors, each of resistance 6Ω, so that the combination has a resistance of (i) 9Ω (ii) 2Ω [3 MARKS]
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The charge in coulombs of 1 gram ion of N^3- is (the charge on an electron is 1.602 × 10 ^-19 C) (A) 2.894 × 10 ^5 C (B) 3.894 × 10 ^5 C (C) 2.894× 10^6 C (D) none of these
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What is the nature of a lens having a power of + 0.5 D ?
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The scientist who first carried out critical nuclear fission reaction is _____.
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The units of magnetic flux density is ______.
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The figure shows the current flowing in the coil of wire wound around the soft iron horseshoe core. State the polarities developed at the ends A and B.
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What first is the first law of motion?
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