Home
Class 12
PHYSICS
When 5 V potential difference is applied...

When 5 V potential difference is applied across a wire of length 0.1 m, the drift speed of electrons is `2.5 xx 10^(-4) ms ^(-1)`. If the electron density in the wire is ` 8 xx 10^(28) m^(-3)`, the resistivity of the material is close to :

A

`1.6xx10^(-6)Omegam`

B

`1.6xx10^(-5)Omegam`

C

`1.6xx10^(-8)Omegam`

D

`1.6xx10^(-7)Omegam`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    MOTION|Exercise EXERCISE -4 (Level -II)|25 Videos
  • CURRENT ELECTRICITY

    MOTION|Exercise EXERCISE -3 (Level -II) SECTION F- Electrical Instrument + Exp. Verifying ohm s law & Specific Resistance Using Meter Brige & post Office + Potentiometer (EMF & Int Res.)|3 Videos
  • CONSTRAINED MOTION

    MOTION|Exercise EXAMPLES|12 Videos
  • ELASTICITY

    MOTION|Exercise EXERCISE -3|60 Videos

Similar Questions

Explore conceptually related problems

When 5 V potential difference is applied across a wire of length 0.1 m. The drift speed of electrons is 2.5 xx 10^(-4) ms^(-1) . If the electron density in the wire is 8 xx10^(28) m^(-3) , calculate the resistivity of the material of wire

A potential difference of 5V is applied across a conductor of length 10 cm. IF drift of electron is 2.5 xx 10^(4) m//s , then electron mobility is SI unit is

A potential difference of 4.5 V is applied across a conductor of length 0.1 m. If the drift velocity of electrons is 1.5 xx10^(-4)ms^(-1) , find the electrons mobility.

A potential difference of 5 V is applied across a conductor of length 10 cm . If drift velcoity of electrons is 2.5 xx 10^(-4) m//s , then electron mobility will be

A wire carrying current of 4A and its cross sectional area 10^(-8)m^(2) .If the free electron density in wire is 10^(28)m^(-3) ,the drift velocity is (in m/s)

There is a current of "4.0A" in a wire of cross-sectional area 10^(-6)m^(2) .If the free electron density in wire is 10^(28)m^(-3) ,the drift velocity is :

When 115V is applied across a wire that is 10m long and has a 0.30mm radius, the current density is 1.4xx10^(4) A//m^(2) . The resistivity of the wire is

A potential difference is applied across a wire of length 1 m and resistance 10 Omega , such that the current through it is 1 A. The electric field inside the wire is __________N/C.

The current in a metal wire of cross-sectional area 10^(-6)m^(2) is 1.6A .If the free electron density of the metal is 8times 10^(28)m^(-3) then the drift speed of electrons is

The density of the material of a wire used in sonometer is 7.5 xx 10^(3) kg//m^(3) If these stress on the wire is 3.0 xx 10^(8)N//m^(3) the speed of transverse wave in the wire will be -

MOTION-CURRENT ELECTRICITY-EXERCISE -4 (Level -I)
  1. In the circuit shown below, the key K is closed at t =0. The current t...

    Text Solution

    |

  2. If 400 Omega of resistance is made by adding four 100 Omega resistance...

    Text Solution

    |

  3. The current in the primary circuit of a potentiometer is 0.2 A. The sp...

    Text Solution

    |

  4. If a copper wire is stretched to make it 0.1% longer wha is the percen...

    Text Solution

    |

  5. Two electic bulbs marked 25 W -220 V and 100 W - 220 V are connected i...

    Text Solution

    |

  6. Resistance of a given wire is obtained by mea suring the current flowi...

    Text Solution

    |

  7. The supply voltage to room is 120 V. The resistance of the lead wires ...

    Text Solution

    |

  8. Assertion : Higher the range, greater is the resistance of ammeter. ...

    Text Solution

    |

  9. In a large building, there are 15 bulbs of 40 W, 5 bulbs of 100 W, 5 f...

    Text Solution

    |

  10. When 5 V potential difference is applied across a wire of length 0.1 m...

    Text Solution

    |

  11. In the circuit shown , the current in the 1Omega resistor is :

    Text Solution

    |

  12. A galvanometer having a coil resistance of 100 omega gives a full scal...

    Text Solution

    |

  13. The temperature dependence of resistance of Cu and undoped Si in the t...

    Text Solution

    |

  14. In the above circuit the current in each resistance is -

    Text Solution

    |

  15. In the given circuit diagram when the current reaches steady state in...

    Text Solution

    |

  16. Which of the following statements is false ?

    Text Solution

    |

  17. The reading of the ammeter for a silicon diode in the given circuit is...

    Text Solution

    |

  18. Two batteries with e.m.f 12 V and 13 V are connected in parallel acros...

    Text Solution

    |

  19. On interchanging the resistances, the balance point of a meter bridge ...

    Text Solution

    |

  20. In a potentiometer experiment it is found that no current passes throu...

    Text Solution

    |