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State any one use of infrared radiations...

State any one use of infrared radiations.

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ICSE-SELF ASSESSMENT PAPER -2-SECTION .B.
  1. State any one use of infrared radiations.

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  2. Give one reason of their use for the above purpose.

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  3. Why are these waves mentioned in (i) above, not audible to us?

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  4. With reference to the direction of action, how does a centripetal forc...

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  5. What is meant by the terms (1) amplitude (2) frequency, of a wave ?

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  6. Explain, why stringed musical instruments, like the guitar, are provid...

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  7. What is an Ohmic resistor ?

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  8. Two copper wires are of the same length, but one is thicker than the o...

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  9. Derive a relationship between S.I. and C.G.S. unit of work.

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  10. A Force F acts on a body and displaces it by a distance S in direction...

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  11. In what unit does the domestic electric meter measures the electrical ...

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  12. Why should switches always be connected to the live wire?

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  13. Give one precaution that should be taken while handling switches.

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  14. An electrical gadget can give an electric shock to its user under cert...

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  15. What preventive measure provided in a gadget can protect a person from...

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  16. Jatin puts a pencil into a glass container having water and is surpris...

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  17. Jatin puts a pencil into a glass container having water and is surpris...

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  18. Jatin puts a pencil into a glass container having water and is surpris...

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  19. With reference to the diagram given below, The equivalent resist...

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  20. With reference to the diagram given below, The reading of the am...

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  21. With reference to the diagram given below, The electrical power ...

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