Home
Class 12
PHYSICS
Define drift velocity. A conductor of le...

Define drift velocity. A conductor of length L is connected to a dc source of emf E. If the length of conductor is tripled by stretching it, keeping E constant, explain how do the following factors would vary in the conductor ?
(i) Drift speed of electrons (ii) Resistance and (iii) Resistivity

Text Solution

AI Generated Solution

Promotional Banner

Topper's Solved these Questions

  • ELECTROSTATICS AND CURRENT ELECTRICITY

    CBSE COMPLEMENTARY MATERIAL|Exercise LONG ANSWER QUESTIONS|6 Videos

  • ELECTROSTATICS AND CURRENT ELECTRICITY

    CBSE COMPLEMENTARY MATERIAL|Exercise NUMERICALS|49 Videos

  • ELECTROSTATICS AND CURRENT ELECTRICITY

    CBSE COMPLEMENTARY MATERIAL|Exercise SHORT ANSWER QUESTIONS (2 MARKS)|59 Videos

  • ELECTRONIC DEVICES

    CBSE COMPLEMENTARY MATERIAL|Exercise NUMERICALS|7 Videos

  • SAMPLE QUESTION PAPER 2019

    CBSE COMPLEMENTARY MATERIAL|Exercise Section C|19 Videos

Similar Questions

Explore conceptually related problems

If the length of a wire conductor is doubled by stretching it, keeping the potential difference across it constant, by what factor does the drift speed of the electron change?

A conductor of length L is connected to a dc source of emf epsilon . If this conductor is replaced by another conductor of same material and same area of cross-section but of length 3L, how will the drift velocity change?

A metal wire of length l is connected to an ideal battery of emf V and it is found that drift velocity acquired by the electrons is v_(d) . If the same wire is stretched to double its length then what will be the drift velocity of electrons?

A battery of e.m.f. 2 V and internal resistance 2Omega is connected to an external resistance 8Omega . If the length of the conductor is 4 m, then potential gradient between the two ends of the wire is

A conductor of resistance R and conductance G is stretched to twice its original length keeping its volume constant. Calculate the new resistance and the conductance of the conductor.

CBSE COMPLEMENTARY MATERIAL-ELECTROSTATICS AND CURRENT ELECTRICITY -SHORT ANSWER QUESTIONS (3 MARKS )
  1. A charge Q is distributed over two concentric hollow spheres of radii ...

    Text Solution

    |

  2. Derive an expression for energy density of a parallel plate capacitor.

    Text Solution

    |

  3. You are given an air filled parallel plate capacitor. Two slabs of die...

    Text Solution

    |

  4. In the figure shown, calculate the total flux of the electrostatic fie...

    Text Solution

    |

  5. A conducting slab of thickness ‘t’ is introduced between the plates of...

    Text Solution

    |

  6. If a dielectric slab is introduced between the plates of a parallel pl...

    Text Solution

    |

  7. What is an equipotential surface ? Write three properties Sketch ...

    Text Solution

    |

  8. What is an equipotential surface ? Write three properties Sketch equip...

    Text Solution

    |

  9. Two metal spheres A and B of radius r and 2r whose centres are separat...

    Text Solution

    |

  10. Define specific resistance. Write its SI unit. Derive an expression fo...

    Text Solution

    |

  11. A potential difference V is applied across a conductor of length L and...

    Text Solution

    |

  12. Define drift velocity. A conductor of length L is connected to a dc so...

    Text Solution

    |

  13. Define conductivity of a substance. Give its SI units. How does it var...

    Text Solution

    |

  14. Two cells of emf E1 and E2 having internal resistance r 1 and r...

    Text Solution

    |

  15. Electron drift speed is estimated to be only a few mm/s for currents i...

    Text Solution

    |

  16. Give three differences between e.m.f. and terminal potential differenc...

    Text Solution

    |

  17. Define the terms resistivity and conductivity and state their S. I. un...

    Text Solution

    |

  18. The current flowing through a conductor is 2 mA at 50V and 3 mA at 60V...

    Text Solution

    |

  19. Nichrome and copper wires of same length and area of cross-section are...

    Text Solution

    |

  20. Under what is the heat produced in an electric circuit: (i) directly p...

    Text Solution

    |