Home
Class 12
PHYSICS
Iron and silicon wires are heated form 3...

Iron and silicon wires are heated form `30^(@)C` to `50^(@)C`. The correct statement is that

A

resistance of both wires increase

B

resistance of both wires decrease

C

resistance of iron wire increases and the resistance of silicon wire decreases

D

resistance of iron wire decreases and the resistance of silicon wire increases

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    MOTION|Exercise EXERCISE -2 (OBJECTIVE PROBLEMS NEET)|41 Videos

  • CURRENT ELECTRICITY

    MOTION|Exercise EXERCISE -3 SECTION -A (PREVIOUS YEAR PROBLEMS NEET)|34 Videos

  • CURRENT ELECTRICITY

    MOTION|Exercise EXERCISE -4 (Level -II)|25 Videos

  • CONSTRAINED MOTION

    MOTION|Exercise EXAMPLES|12 Videos

  • ELASTICITY

    MOTION|Exercise EXERCISE -3|60 Videos

Similar Questions

Explore conceptually related problems

The temperature of an iron piece is heated from 30^@ C "to" 90^@ C . What is the change in its temperature on the fahrenheit scale and on the kelvin scale?

Platinum and silicon are cooled after heating up to 250^(@) C. :–

The volume of a gas at 0^(0)C is 546cc . At constant pressure it is heated from 30^(0)C to 50^(0)C the change in volume is

When the temperature of an iron sphere of mass 1kg. falls from 30^(@)C to 25^(@) C, then 550 calories of heat are released The heat capacity of iron sphere will be in Cal//.^(@)C

When the temperature of silicon sample is increased from 27^(@)C to 100^(@)C , the conductivity of silicon will be

MOTION-CURRENT ELECTRICITY-EXERCISE -1 (OBJECTIVE PROBLEMS NEET)
  1. The resistance of wire is 20 Omega. The wire is stretched to three tim...

    Text Solution

    |

  2. The dimensions of a mangnin block are 1 cm xx 1 cm xx100 cm The electr...

    Text Solution

    |

  3. Iron and silicon wires are heated form 30^(@)C to 50^(@)C. The correct...

    Text Solution

    |

  4. When the resistance of copper wire is 0.1 Omega and the radius is 1mm,...

    Text Solution

    |

  5. When a resistance wire is passed through a die the cross-section area ...

    Text Solution

    |

  6. In the following diagram two parallelopiped A and B are of the same th...

    Text Solution

    |

  7. A conductor with rectangular cross section has dimensions (axx2axx4a) ...

    Text Solution

    |

  8. A piece of copper and another of germanium are cooled from room temper...

    Text Solution

    |

  9. A cylindrical copper rod is reformed to twice its original length with...

    Text Solution

    |

  10. The length of a conductor is halved. Its conductance will be

    Text Solution

    |

  11. The current in a metallic conductor is plotted against voltage at two ...

    Text Solution

    |

  12. Net resitance between X and Y is –

    Text Solution

    |

  13. Net resitance between X and Y is –

    Text Solution

    |

  14. Net resitance between X and Y is –

    Text Solution

    |

  15. The equivalent resistance between the terminal point P and Q is 4 Omeg...

    Text Solution

    |

  16. At a point sum i=0 in a circuit with one emf source, then –

    Text Solution

    |

  17. For the following circuits, the potential difference between X and Y i...

    Text Solution

    |

  18. Reading of ideal .ammeter in ampere for the following circuit is –

    Text Solution

    |

  19. The equivalent resistance in series combination is

    Text Solution

    |

  20. A rectangular carbon block has dimensions 1.0 cmxx 1.0 xx50 cm. (i) ...

    Text Solution

    |