Home
Class 10
PHYSICS
Why are coils of electric toasters and e...

Why are coils of electric toasters and electric irons made of an alloy rather than a pure metal?

Text Solution

Verified by Experts

Alloys have high resistivity in comparison to pure metals. Also, alloys do not oxidize readily at high temperatures, but pure metals do. Therefore, alloys are used for making coils of electric toasters and electric irons rather than a pure metal.
Promotional Banner

Topper's Solved these Questions

  • ELECTRICITY

    ZEN PUBLICATION|Exercise QUESTIONS SECTION (TEXTUAL EXERCISE)|36 Videos

  • ELECTRICITY

    ZEN PUBLICATION|Exercise ZEN ADDITIONAL QUESTIONS SECTION (VERY SHORT ANSWER TYPE QUESTIONS)|42 Videos

  • LIGHT - REFLECTION AND REFRACTION

    ZEN PUBLICATION|Exercise ZEN ADDITIONAL QUESTIONS SECTION (LONG ANSWER [LA] QUESTIONS)|30 Videos

Similar Questions

Explore conceptually related problems

Why are coils of electric toasters and electric irons are made of an alloy rather than a pure metal?

Explain the following. a] Why is tungsten used almost exclusively for filament of electric lamps? b] Why are the conductors of electric heating devices, such as bread-toasters and electric irons made of an alloy rather than a pure metal? c] Why is the series arrangement not used for domestic circuits? d] How does the resistance of a wire vary with its area of cross-section? e] Why are copper and aluminum wires usually employed for electricity transmission?

i] Heating elements of electrical heating devices is made up of an alloy rather than a pure metal. Give two reasons. ii] Four resistors of 2Omega each are joined end to end to form a square. Calculate the equivalent resistance of the combination between two adjacent corners?

Why element of electrical heating devices are made up of alloys ?

Why is an atom electrically neutral?

Why do transition metals from alloy ?

ZEN PUBLICATION-ELECTRICITY-ZEN ADDITIONAL QUESTIONS SECTION (MULTIPLE CHOICE QUESTIONS)
  1. Why are coils of electric toasters and electric irons made of an alloy...

    Text Solution

    |

  2. A cell, a resistor, a key and ammeter are arranged as shown in the cir...

    Text Solution

    |

  3. Electrical resistivity of a given metallic wire depends upon

    Text Solution

    |

  4. What is the maximum resistance which can be made using five resistors ...

    Text Solution

    |

  5. What is the minimum resistance which can be made using five resistors ...

    Text Solution

    |

  6. Which of the following represents voltage?

    Text Solution

    |

  7. Unit of electric power may also be expressed as

    Text Solution

    |

  8. Which of the following statements does not represent Ohm's law?

    Text Solution

    |

  9. Two resistances of 100 Ω and zero ohm are connected in parallel. Th...

    Text Solution

    |

  10. Three resistors 2 Ω, 3Ω and 4Ω are connected so that the equivalent re...

    Text Solution

    |

  11. When a current 'l' flows through a resistance 'R' for time 't' the ele...

    Text Solution

    |

  12. When a fuse is rated 8 A, it means

    Text Solution

    |

  13. The work done in moving a unit positive charge across two points in an...

    Text Solution

    |

  14. The potential at a point is 20 V. The work done to bring a charge of 0...

    Text Solution

    |

  15. The free electrons of a metal

    Text Solution

    |

  16. The path of a free electron in a metal is

    Text Solution

    |

  17. When there is an electric current passing through a wire, the particle...

    Text Solution

    |

  18. A positive charge released from rest

    Text Solution

    |

  19. Three equal resistances when combined in series are equivalent to 90Ω....

    Text Solution

    |

  20. For which of the following substances, resistance decreases with incre...

    Text Solution

    |

  21. Two electric bulbs have resistances in the ratio 1 : 2. If they are jo...

    Text Solution

    |