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State any one use of infrared radiations...

State any one use of infrared radiations.

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Infrared radiations are used in remote control of television.
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ICSE-SAMPLE PAPER 2011-SECTION-II
  1. Write a relation between the angle of incidence (i), angle of emerge...

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  2. Suggest one way, in each case, by which we can detect the presence of:...

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  3. State any one use of infrared radiations.

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  4. An object is placed in front of a lens between its optical centre and ...

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  5. An object is placed in front of a lens between its optical centre and ...

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  6. Name the type of waves which are used for sound ranging.

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

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  8. Give one use of sound ranging.

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  9. A man standing 25 m away from a wall produces a sound and receives the...

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  10. A man standing 25 m away from a wall produces a sound and receives the...

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  11. Name two safety devices which are connected to the live wire of a hous...

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  12. Give one important function of each of these two devices. i) Switch ii...

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  13. Draw a graph of Potential difference (V) versus Current (I) for an ohm...

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  14. How can you find the resistance of the resistor from this graph?

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  15. What is a non-ohmic resistor ?

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  16. An electric bulb is marked 100 W, 250 V. What information does this co...

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  17. How much current will the bulb draw, if connected to a 250 V supply?

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  18. Three resistors are connected to a 12 V battery as shown in the figure...

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  19. Three resistors are connected to a 12 V battery as shown in the figure...

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  20. Three resistors are connected to a 12 V battery as shown in the figure...

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