Home
Class 12
PHYSICS
Calculate the drift speed of electrons w...

Calculate the drift speed of electrons when 1A of current flows in a copper wire of cross section 2 `"min"^2` . The number of free electrons in `1 cm^3` of copper is `8.5 xx 10^(22)`.

Text Solution

Verified by Experts

From te current and drift velocity relation I = Ane `v_d`,
`v_d = I/("Ane") =(1)/(2xx10^(-6) xx 8.5 xx 10^(28) xx 1.6xx10^(-19))`
`=3.7xx10^(-5) ` m/s
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise EXERCISE (LONG ANSWER QUESTIONS)|2 Videos

  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise EXERCISE (SHORT ANSWER QUESTIONS)|1 Videos

  • COMMUNICATION SYSTEMS

    AAKASH SERIES|Exercise PRACTICE EXERCISE (TV Antenna)|16 Videos

  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise EXERCISE - III|73 Videos

Similar Questions

Explore conceptually related problems

A circular coil of 20 turns and radius 10 cm is placed in a uniform magnetic field of 0.10 T normal to the plane of the coil. If the current in the coil is 5.0 A, what is the (a) total torque on the coil, (b) total force on the coil, (c) average force on each electron in the coil due to the magnetic field? (The coil is made of copper wire of cross-sectional area 10^(-5) m^2 , and the free electron density in copper is given to be about 10^29 m^(-3) .)

Calculate the speed of a transverse wave in a wire of 1.0 mm^2 cross-section under a tension of 0.98 N. Density of the material of wire is 9.8 xx 10^3 kg//m^3 .

Estimate the average drift speed of conduction electrons in a copper wire of cross-sectional area 3.0 xx 10^(-7) m^(2) carrying a current of 5A. Assume that each copper atom contributions roughly one conduction electron. The density of copper is 9.0 xx 10^(3) kg//m^(3) and its atomic mass is 63.5 u.

A block of mass 1 kg is fastended to one end of a copper wire of cross- sectional area 1 mm^(2) and is rotated in a horizontal circle of radius 20 cm. If the breaking stress of copper is 5 xx 10^(8)Nm^(-2) , find the maximum number of revolutions the block make in the minute without the string breaking.

Estimate the average drift speed of conduction electrons in a copper wire of cross-sectional area 1.0 xx 10^(-7) m^(2) carrying a current of 1.5 A. Assume that each copper atom contributes roughly one conduction electron. The density of copper is 9.0 xx 10^(3) kg//m^(3) and its atomic mass is 63.5 u.

AAKASH SERIES-CURRENT ELECTRICITY-PROBLEMS (LEVEL-II)
  1. Calculate the drift speed of electrons when 1A of current flows in a c...

    Text Solution

    |

  2. A battery of emf 10 V and internal resistance 3Omega is connected to a...

    Text Solution

    |

  3. At room temperature (27.0^@ C) the resistance of a heating element is ...

    Text Solution

    |

  4. Determine the current in each branch of the network shown in figure.

    Text Solution

    |

  5. A storage battery of emf 80V and internal resistance 0.5Omega is being...

    Text Solution

    |

  6. Two wires of equal length, one of aluminium and the other of copper ha...

    Text Solution

    |

  7. Given 'n' resistors each of resistance R, how will you combine them to...

    Text Solution

    |

  8. Determine the equivalent resistance of networks shown in figures above

    Text Solution

    |

  9. Given the resistances 1 Omega , 2 Omega , 3 Omega how will you combine...

    Text Solution

    |

  10. Given the resistances 1 Omega , 2 Omega , 3 Omega how will you combine...

    Text Solution

    |

  11. Given the resistances 1 Omega , 2 Omega , 3 Omega how will you combine...

    Text Solution

    |

  12. (6//11) Omega

    Text Solution

    |

  13. Figure shows a 2.0 V potentiometer used for the determination of inter...

    Text Solution

    |

  14. A heating element using nichrome connected to a 230 V supply draws an ...

    Text Solution

    |

  15. The earth's surface has a negative surface charge density of 10^(-9)C ...

    Text Solution

    |

  16. Six lead-acid secondary cells each of emf 2.0 V and internal resistanc...

    Text Solution

    |

  17. A secondary cell after long use has an emf of 1.9 V and a large intern...

    Text Solution

    |

  18. Determine the current drawn from a 12V supply with internal resistance...

    Text Solution

    |

  19. Figure shows a potentiometer with a cell of 2.0 V and internal resista...

    Text Solution

    |

  20. Figure shows a potentiometer with a cell of 2.0 V and internal resista...

    Text Solution

    |

  21. Figure shows a potentiometer with a cell of 2.0 V and internal resista...

    Text Solution

    |