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State two characteristics of a good ther...

State two characteristics of a good thermion emitter.

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ICSE-SAMPLE PAPER 2017-SECTION-II
  1. State two characteristics of a good thermion emitter.

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  2. A uniform half metre rule balances horizontally on a knife edge at 29 ...

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  3. A uniform half metre rule balances horizontally on a knife edge at 29 ...

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  4. A boy uses a single fixed pulley to lift a load of 50 kgf to some heig...

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  5. How does uniform circular motion differ from uniform linear motion ?

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  6. Name the process used for producing electricity using nuclear energy.

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  7. A pulley system with V.R. = 4 is used to lift a load of 175 kgf throug...

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  8. A pulley system with V.R. = 4 is used to lift a load of 175 kgf throug...

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  9. A pulley system with V.R. = 4 is used to lift a load of 175 kgf throug...

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  10. A pulley system with V.R. = 4 is used to lift a load of 175 kgf throug...

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  11. How is the transference of heat energy by radiation prevented in a cal...

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  12. You have a choice of three metals A, B and C, of specific heat capacit...

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  13. Calculate the mass of ice needed to cool 150 g of water contained in a...

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  14. Name the radiations which are absorbed by the green house gases in the...

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  15. A radiation X is focused by a particular device on the bulb of a therm...

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  16. Name two factors on which the heat energy liberated by a body depends.

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  17. A lens forms an upright and diminished image of an object when the obj...

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  18. A lens forms an upright and diminished image of an object when the obj...

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  19. A ray of light travels from water to air as shown in the diagram given...

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  20. A ray of light travels from water to air as shown in the diagram given...

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  21. The diagram below shows a point source P inside a water container. Fou...

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