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Which of the two wires of similar dimens...

Which of the two wires of similar dimensions, copper or nichrome, would you use for the electric heater element? Give reasons to justify your answer.

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Nichrome wire is used for electric heater, because it has high melting point and high resistivity.
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ICSE-SAMPLE QUESTION PAPER 5 -SECTION B
  1. State Ohm's law? How can it be varified experimentally ? Does it hold ...

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  2. A metal wire of resistance 6Omega is stretched so that its length is i...

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  3. A man spend 6-4 KJ energy in displacing a body by 64 m in the directio...

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  4. A man spend 6-4 KJ energy in displacing a body by 64 m in the directio...

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  5. Which of the two wires of similar dimensions, copper or nichrome, woul...

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  6. Two fuse wires are rated 5 A and 20 A. Which of the two is (i) thicker...

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  7. (a) State the laws of refraction of light. Give an expression to relat...

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  8. Write a relation between the angle of incidence (i), angle of emerge...

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  9. How is the heat capacity of the body related to its specific heat capa...

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  10. Represent the change in the nucleus of radioactive element when alpha ...

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  11. What is the name given to elements with same mass number and different...

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  12. Under which condition does the nucleus of an atom tend to be radioacti...

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  13. Heat supplied to a solid changes it into liquid. What is this change i...

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  14. During the phase change does the average kinetic energy of the molecul...

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  15. What is the energy absorbed during the phase change called ?

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  16. A nucleus ""(11)Na^(24) emits a beta particle to change into Magnesium...

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  17. A nucleus ""(11)Na^(24) emits a beta-particle to change into magnesium...

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  18. A nucleus ""(11)Na^(24) emits a beta particle to change into Magnesium...

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  19. With the help of a well-labelled diagram, show that the apparent depth...

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  20. How is the refractive index of a medium related to the real and appare...

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