Home
Class 10
PHYSICS
The resistivity of copper is 1.7xx10^(-8...

The resistivity of copper is `1.7xx10^(-8) Omega m.` Another copper wire of the same length but of half the diameter as the first is taken. What is the ratio of its resistance to that of the first wire ?

Text Solution

Verified by Experts

The correct Answer is:
4:1 (4 times)
Promotional Banner

Topper's Solved these Questions

  • MAGNETIC EFFECT OF ELECTRIC CURRENT

    HC VERMA|Exercise QUESTION BANK |30 Videos

Similar Questions

Explore conceptually related problems

What will be resistivity of a copper wire B compared to another copper wire A of triple its length and double its diameter ?

A wire X is half the diameter and half the length of a wire Y of similar material. The ratio of resistance of X to that of Y is

Two copper wires of the same length have got different diameters a. which wire has greater resistance? b. greater specific resistance?

The resistivity os copper is 1.76 xx 10^-8 ohm m. The radius of the wire is 1 mm . Calculate the length of a telegraph wire needed for having a resistance of 10.5 Omega .

A given copper wire of resistance R is stretched to reduce its diameter to half its previous value. What sould be its new resistance ?

The resistivity of iron is 1 xx 10^(-7) ohm -m. The resistance of a iron wire of paritcular length and thickness is 1 ohm. If the length and the diameter of wire both are doubled, then the resistivity in ohm-m will be

HC VERMA-DISPERSION AND SCATTERING OF LIGHT-QUESTION BANK
  1. In an experiment, the current flowing through a resistor and the poten...

    Text Solution

    |

  2. The resistivity of copper is 1.7xx10^(-8) Omega m. What length of copp...

    Text Solution

    |

  3. The resistivity of copper is 1.7xx10^(-8) Omega m. Another copper wire...

    Text Solution

    |

  4. Three resistors, each of resistance 12 Omega, are connected in paralle...

    Text Solution

    |

  5. A uniform wire of resistance R is cut into two equal pieces, and these...

    Text Solution

    |

  6. How will you join the resistors of resistances 3 Omega, 6 Omega and 8 ...

    Text Solution

    |

  7. Find the current supplied by the cell in the circuit shown in Figure 4...

    Text Solution

    |

  8. In the circuit shown below, calculate the total resistance of the circ...

    Text Solution

    |

  9. Figure 4.E5 shows a part of an electric circuit. The reading of the am...

    Text Solution

    |

  10. A 12 -V battery connected to a bulb drives a current of 2.0 A through ...

    Text Solution

    |

  11. A current of 1.5 A flows through a wire of 8 Omega Find the amount of ...

    Text Solution

    |

  12. A current of 2A produces 200J of heat in a wire in a given period of t...

    Text Solution

    |

  13. A bulb is rated 5.0 V, 100 mA. Calculate its rated power and resistanc...

    Text Solution

    |

  14. Calculate the resistance of a bulb rated 40 W ,230 V when in On condi...

    Text Solution

    |

  15. Calculate the current 10Omega and 20Omega are joined in series. A pote...

    Text Solution

    |

  16. Two resistors of resistances 10 Omega and 20 Omega are joined in serie...

    Text Solution

    |

  17. Two resistors of resistances 10 Omega and 20 Omega are joined in paral...

    Text Solution

    |

  18. Calculate the energy consumed in kilowatt hours by a 60-W fan in 2 hou...

    Text Solution

    |

  19. A heater draws 1100 W at 220 V. Find the resistance of the heater when...

    Text Solution

    |

  20. A heater draws 1100 W at 220 V.Calculate the kilowatt hours consumed i...

    Text Solution

    |