Home
Class 12
PHYSICS
A copper wire has a square cross section...

A copper wire has a square cross section of 6 mm on a side. The wire is 10 m long and carries a current of 3.6A. The density of free electrons is `8.5xx10^(28)//m^3.`Find the magnitude of (a) the current density in the wire , (b) the electric field in the wire. (c ) How much time is required for an electron to travel the length of the wire? `(rho, "electrical resistivity, is " 1.72 xx10^(-8) Omegam.)`

Promotional Banner

Topper's Solved these Questions

  • CAPACITANCE

    PHYSICS GALAXY - ASHISH ARORA|Exercise UNSOLVED NUMERICAL PROBLEMS|40 Videos

  • ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENT

    PHYSICS GALAXY - ASHISH ARORA|Exercise Advance MCQs|33 Videos

Similar Questions

Explore conceptually related problems

A copper wire has a square cross section of 6 mm on a side. The wire is 10 m long and carries a current of 3.6A. The density of free electrons id 8.5x10^(28)//m^3. Find the magnitude of (a) the current density in the wire , (b) the electric field in the wire. (c ) How much time is required for an electron to travel the length of the wire? ("rh, electrical resistivity, is" 1.72 xx10^(-8) Omegam.)

A copper wire has a square cross-section, 2.0 mm on a side. It carries a current of 8 A and the density of free electrons is 8 xx 10^(28)m^(-3) . The drift speed of electrons is equal to

A current of 4.8 A is flowing in a copper wire of cross-sectional area 3xx10^(-4) m^(2) . Find the current density in the wire.

There is a copper wire of length 2.2 m, of area of cross-section 2.0sq.mm, carrying a current of 6.0A. If the number density of electrons in copper is 8.5 xx10^(28) m^(-3) , find the time taken by an electron to drift from one end to another end of the wire.

A copper wire of cross sectional area 2.0 mm^(2) , resistivity =1.7xx10^(-8)Omegam , carries a current of 1 A. The electric field in the copper wire is

An aluminium wire carrying a current has diameter 0.84 mm . The electric field in the wire 0.49 V//m . What is (a) the current carried by the wire? (b) the potential difference between two points in the wire 12.0 m apart? (c) the resistance of a 12.0 m length of this wire? Specific resistance of aluminium is 2.75 xx 10^-8 Omega -m.

A metallic wire carries a current of 100 A , its area of cross section is 1 cm^(2) . If the resistivity of the copper is 1.7xx10^(-8) Omega m , then the electric field strength in the copper will be

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 230 V is applied across a wire that is 14.1 m long and has a 0.30 mm radius, the magnitude of the current density is 198 xx 10^(8) A//m^(2). Find the resistivity of the wire.

PHYSICS GALAXY - ASHISH ARORA-CURRENT ELECTRICITY-All Questions
  1. Find the total linear momentum of the electrons in a conductor of leng...

    Text Solution

    |

  2. Two large parallel metal plartes are located in vacuum. One of these s...

    Text Solution

    |

  3. A copper wire has a square cross section of 6 mm on a side. The wire i...

    Text Solution

    |

  4. How many electrons per second pass through a section of resistance of ...

    Text Solution

    |

  5. 1 meter long metallic wire is broken into two unequal parts P and Q. ...

    Text Solution

    |

  6. The area of cross-section, length and density of a piece of a metal of...

    Text Solution

    |

  7. Find equivalent resistant across terminals A and B in the circuit show...

    Text Solution

    |

  8. Find equivalent resistance of the circuit shown in figure 3.32 across ...

    Text Solution

    |

  9. Calculate battery current and equivalent resistance of the network sho...

    Text Solution

    |

  10. A long resistor between point A and B as shown in figure-3.35 has reis...

    Text Solution

    |

  11. You need to produce a set of cylindrical copper wires 2.5 m long that ...

    Text Solution

    |

  12. Two resistors with temperature coefficients of resistance alpha1 and a...

    Text Solution

    |

  13. Two coils connected in series have resistance of 600K Omega and 300 Om...

    Text Solution

    |

  14. Shown a conductor of length l having a circular cross section. The rad...

    Text Solution

    |

  15. ABCD is a square where each side is a uniform wire of resistance 1Omeg...

    Text Solution

    |

  16. Four resistors R(1),R(2),R(3) and R(4) are connected between two termi...

    Text Solution

    |

  17. In fig the steady state current in 2omega resistance is

    Text Solution

    |

  18. Find the equivalent resistance and current in 6Omega resistance in the...

    Text Solution

    |

  19. In a Wheatstone's bridge a battery of 2V is used all shown in figure-3...

    Text Solution

    |

  20. Find the equivalent resistance across the terminals A and B in the cir...

    Text Solution

    |