Home
Class 12
PHYSICS
Electron density in a conductor of area ...

Electron density in a conductor of area of cross section `0.006 cm^2` is `8.0 xx10^(22) cm ^(-3)` . Calculate the drift velocity of electron in the wire if a current of 2 flows through it.

Text Solution

AI Generated Solution

To solve the problem of finding the drift velocity of electrons in a conductor given the electron density, cross-sectional area, and current, we can follow these steps: ### Step-by-Step Solution: 1. **Identify the Given Values:** - Electron density, \( n = 8.0 \times 10^{22} \, \text{cm}^{-3} \) - Area of cross-section, \( A = 0.006 \, \text{cm}^2 \) - Current, \( I = 2 \, \text{A} \) ...
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    MODERN PUBLICATION|Exercise CONCEPTUAL QUESTIONS|35 Videos
  • CURRENT ELECTRICITY

    MODERN PUBLICATION|Exercise TOUGH AND TRICKY PROBLEMS|23 Videos
  • CURRENT ELECTRICITY

    MODERN PUBLICATION|Exercise Chapter Practice Test|15 Videos
  • ATOMS

    MODERN PUBLICATION|Exercise Chapter Practice Test|16 Videos
  • DUAL NATURE OF RADIATION AND MATTER

    MODERN PUBLICATION|Exercise CHAPTER PRACTICE TEST|15 Videos

Similar Questions

Explore conceptually related problems

If n,e,A and v_(d) are free electron density inside conductor , charge of electron , area of cross-section of conductor and drift velocity of free electrons inside conductor, then current l through the conductor is

Electron density in a copper wire is 8.0 xx10^(22) cm ^(-3) . Calculate the relaxation time for electrons if the resistivity of copper is 1.68xx10^(-8) Omega m at room temperature. (Massof electron is 9.1 xx10^(-31) kg .)

The resistance of a wire of length 80 cm and of uniform area of cross-section 0.025 cm^2 , is found to be 1.50 ohm. Calculate the resistivity of the wire.

A current of 30 ampere is flowing through a wire of cross-sectional area 2 mm^(2) . Calculate the drit velocity of electrons. Assuming the temperature of the wire to be 27^(@)C , also calculate the rms velocity at this temperature. Which velocity is larger ? Given that Boltzman's constant =1.38xx10^(-23) J K^(-1) , density of copper 8.9 g cm^(-3) , atomic mass of copper =63.

A current of 5 ampere is passing through a metallic wire of cross-section area 4 xx 10^-6 m^2 . If the density of the charge carries in the wire is 5 xx 10^26 m^3 , find the drift speed of the electrons. (b) In copper there are 10^22 free electrons per c.c. , all of which contribute to a current of 1 ampere in a wire of copper of 0.01 cm^2 cross-sectional area : (i) What is the average speed of electrons in the copper ? (ii) What is the electric field in the wire ? Given specific resistance of copper 1.6 xx 10^-8 ohm-meter . ( c) The area of cross-section, length and density of a piece of a metal of atomic weight 60 are 10^-6 m^2, 1.0 m and 5 xx 10^3 kg//m^3 respectively. Find the number of free electrons per unit volume if every atom contributes one free electron. Also, find the drift velocity of electrons in the metal when a current of 16 A passes through it. (Given : Avogadro number 6 xx 10^26//kg-"mole" ).

A current 0.5 amperes flows in a conductor of cross-sectional area of 10^(-2) m^2 . If the electron density is 0.3 * 10^(28) m^(-3) , then the drift velocity of free electrons is

The current i flows in a wire of circular cross-section with the free electrons travelling with a drift velocity v. What is the drift velocity of electrons when a current of 2 i flows in another wire of twice the radius and of the same material ?

If A is the area of cross section of conductor, v_(d) is the drift velocity of electrons and n is the number of electrons per unit volume, then current density through conductor is

MODERN PUBLICATION-CURRENT ELECTRICITY-PRACTICE PROBLEMS
  1. A discharge tube is connected to a power supply of 200 V . Calculate t...

    Text Solution

    |

  2. Find the current flowing through a copper wire of length 15 cm ,with a...

    Text Solution

    |

  3. Electron density in a conductor of area of cross section 0.006 cm^2 is...

    Text Solution

    |

  4. Estimate the average drift speed of conduction electrons in a copper w...

    Text Solution

    |

  5. Find the average drift velocity of electrons if a wire of cross sectio...

    Text Solution

    |

  6. Find the average drift wire with area of cross section 0.01 cm^2 ,conn...

    Text Solution

    |

  7. Calculate the relaxation time of electron in previous problem. Given m...

    Text Solution

    |

  8. Six identical resistance of resistance 20 Omega each are connected in ...

    Text Solution

    |

  9. Calculate the effective resistance for the given combination between t...

    Text Solution

    |

  10. Three identical resistances of 2 Omega are connected through a metalli...

    Text Solution

    |

  11. Given the resistances of 1 Omega, 2 Omega and 3 Omega . How will you ...

    Text Solution

    |

  12. A parallel combination of three resistors takes a current of 5 A from ...

    Text Solution

    |

  13. Write the sequence of coloours in a carbon resistor having resistance ...

    Text Solution

    |

  14. Calculate the voltage across a colour-coded carbon resistor with colou...

    Text Solution

    |

  15. The resistance of a colour-coded carbon resistance is 670 Omega . Fin...

    Text Solution

    |

  16. Three resistors with conductanes G1 , G2 and G3 are connected as shown...

    Text Solution

    |

  17. In the previous problem, calculate the effective conductance if all th...

    Text Solution

    |

  18. A wire of uniform cross section of resistance 16 Omega is divided into...

    Text Solution

    |

  19. Calculate the electric power of an electric bulb of resistance 400 Ome...

    Text Solution

    |

  20. An electric pump of 0.8 hp is used in water supply system in a house. ...

    Text Solution

    |