Home
Class 9
PHYSICS
Choose the correct alternative. Resist...

Choose the correct alternative.
Resistivity of a wire of length L is p. Yash broke this wire into two equal picces of length `L/2` .The resistivity of each piece will be

A

`rho`

B

`2 rho`

C

`rho/2`

D

`rho/4`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • INFORMATION COMMUNICATION TECHNOLOGY (ICT)

    TARGET PUBLICATION|Exercise EXERCISE|76 Videos

Similar Questions

Explore conceptually related problems

Choose correct alternative. The radiusof a copper wire is doubled.Its specific resistance

Choose correct alternative. A thick wire of resistance 25 Omega is drawn into a thin wire such that itslength becomes four times. The new resistance of the wire will be A. 50 Ω B. 25 Ω C. 100 Ω D. 400 Ω

Choose correct alternative. The wire of length L and resistance R isstretched so that its radius of cross-section is halved. What is its new resistance?

Choose correct alternative. A wire of length 20 cm has resistance 5 Omega . It is stretched up to 60 cm, its resistance will be

Choose correct alternative. Two wires have their lengths in the ratio 5:3 and radii in the ratio 1: 2 . Ratio of their resistivity is 3: 4 . The ratio of resistance is

Choose correct alternative. A wire of resistance 20 Omega is uniformly stretched to thrice its original length. The length change in its resistance is

Choose correct alternative. A wire of resistance 100 Omega is cut into 10 equal parts and all 10 parts are bundled together. The equivalent resistance of the wire now becomes.

Choose correct alternative. Two wires of same material and same length are connected in series. The area of cross section of wires is in ratio 3:1 . The resistance of thicker wire is 10 Omega . The total resistance of combination is

Choose correct alternative. A uniform copper wire of resistance 5 Omega is uniformly stretched, doubled the new resistance of the wire will be

Choose correct alternative. Masses of three pieces of wires made of the same metal are in the ratio 1:3:5 and their lengths are in the ratio 5:3:1 . The ratios of their resistances are

TARGET PUBLICATION-CURRENT ELECTRICITY-EXERCISE
  1. Answer the following question: You must have seen a waterfull. Which ...

    Text Solution

    |

  2. Using the internet find out about the different softwares used to solv...

    Text Solution

    |

  3. Solve the cross-word. Across 2. A combination of resistances that r...

    Text Solution

    |

  4. Choose the correct alternative. Resistivity of a wire of length L is...

    Text Solution

    |

  5. Choose the correct alternative. If the effective resistance is to be...

    Text Solution

    |

  6. Choose the correct alternative. If three resistors, having values 2 ...

    Text Solution

    |

  7. Choose the correct alternative. In combination of resistors, the cur...

    Text Solution

    |

  8. Answer the following. Find the odd one out and justify your answer. ...

    Text Solution

    |

  9. Answer the following. Complete the given analogy. Series combinatio...

    Text Solution

    |

  10. Answer the following. Match the columns.

    Text Solution

    |

  11. Answer the following. Name the following. A device used to measure ...

    Text Solution

    |

  12. Give scientific reasons. Why does a thick wire have low resistance?

    Text Solution

    |

  13. Give scientific reasons. Fuse wire is made from the material with low...

    Text Solution

    |

  14. Answer the following. Give any four examples of conductors

    Text Solution

    |

  15. Answer the following. The resistance of the filament of a bulb is 1...

    Text Solution

    |

  16. Answer the following. Distinguish between Resistances in series and...

    Text Solution

    |

  17. Answer the following Explain the concept of flow of electric current...

    Text Solution

    |

  18. Answer the following. If the resistors 30 Omega, 40 Omega and 60 Omeg...

    Text Solution

    |

  19. Answer the following. Derive the expression for equivalent resistanc...

    Text Solution

    |

  20. Answer the following. Draw symbols of the following components. Also ...

    Text Solution

    |