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State the safe limit of sound level in t...

State the safe limit of sound level in terms of decibel for human hearing.

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Safe limit of sound level upto 120 dB
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ICSE-SAMPLE QUESTION PAPER 4 -SECTION B
  1. State the safe limit of sound level in terms of decibel for human hear...

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  2. The diagram below shows three different modes of vibration P, Q and R ...

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  3. Following diagram shows three different mode of vibrations P, Q and R ...

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  4. The adjacent diagram shows three different modes of vibrations P, Q an...

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  5. Copy and complete the ray diagram to show the formation of the image ...

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  6. Name the lens LL'.

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  7. Name a device in which this principle is used.

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  8. Name the waves (a) of lowest wavelength, (b) used for taking photograp...

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  9. A stone of mass 'm' is rotated in a circular path with a uniform speed...

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  10. A stone of mass 'm' is rotated in a circular path with a uniform speed...

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  11. A stone of mass 'm' is rotated in a circular path with a uniform speed...

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

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  13. The diagram (a) and (b) given below are of a plug and a socket with ar...

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  14. Calculate the electrical energy consumed when a bulb of 40 W is used f...

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  15. Which wire in a power circuit is connected to the metallic body of the...

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  16. Give two characteristics of a high tension wire.

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  17. An engine can pump 30,000 L of water to a vertical height of 45 m in 1...

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  18. (a) What is a calorimeter ? (b) Name the material of which it is m...

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  19. (a) What is a calorimeter ? (b) Name the material of which it is m...

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  20. A cell is sending current in an external circuit. How does the termina...

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  21. Name the material used for filament of an electric bulb,

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