Home
Class 12
PHYSICS
A wire of 50 cm long, 1mm^(2) in cross-s...

A wire of 50 cm long, `1mm^(2)` in cross-section carries a current of 4 A, when connected to a 2 V battery, the resistivity of wire is

A

`2xx10^(7)Omega-m`

B

`5xx10^(-7)Omega-m`

C

`4xx10^(-6)Omega-m`

D

`1.6xx10^(7)Omega-m`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • MOCK TEST 1

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise MCQs|48 Videos

  • MOCK TEST 3

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise MCQs|41 Videos

Similar Questions

Explore conceptually related problems

A nichrome wire 50 cm long and one square millimetre cross- section carries a current of 4 A when connected to a 2 V battery. The resistivity of nichrome wire in ohm metre is

A wire of non-uniform cross-section is carrying a steady current. Along the wire

A copper wire of length 50cm and area of cross-section 10^(-6)m^(2) caries a current of 1A .If the resistivity of copper is 1.8times10^(-8)Omegam .The electrical field across the wire is

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 long straight wire of circular cross- section carries a current along its length. On the axis inside the wire, it follows that

A conductor wire having 10^29 free electrons / m^3 carries a current of 20A. If the cross-section of the wire is 1mm^2 , then the drift velocity of electrons will be :

A wire of 10m long and 1mm^(2) area of cross section is strechted by a force of 20N . If the elongation is 2mm the young's modulus of the material of the wire (in Pa ) is

A battery is connected across a resistance wire of uniform cross-section . If another resistance wire is connected in parallel, then the intensity of electric field in the first wire will

MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-MOCK TEST 2-MCQs
  1. Diameter of a plano-convex lens is 6cm and thickness at the centre is ...

    Text Solution

    |

  2. Two bars A and B of circular cross section, same volume and made of th...

    Text Solution

    |

  3. The surface of soap solution is 25xx10^-3Nm^-1. The excess pressure in...

    Text Solution

    |

  4. A sinusoidal wave travelling in the same direction have amplitudes of ...

    Text Solution

    |

  5. If a string fixed at both ends vibrates in four loops. The wavelength ...

    Text Solution

    |

  6. For a wave y = 0.02 sin [2pi (110 t -(x)/(3))+(pi)/(3)] is travellin...

    Text Solution

    |

  7. A beaker contains water up to a height h(1) and kerosene of height h(2...

    Text Solution

    |

  8. The Young's double slit experiment is carried out with light of wavele...

    Text Solution

    |

  9. At a point on the right bisector of a magnetic dipole the magnetic pot...

    Text Solution

    |

  10. The angular width of the central maximum of the diffraction patternn i...

    Text Solution

    |

  11. In fog, photographs of the objects taken with infrared radiations are ...

    Text Solution

    |

  12. Find the electric field in region II as in figure shown.

    Text Solution

    |

  13. A wire of 50 cm long, 1mm^(2) in cross-section carries a current of 4 ...

    Text Solution

    |

  14. A gamma-ray photon is passing near a nucleus and breaks into an electr...

    Text Solution

    |

  15. The frequency f of vibrations of a mass m suspended from a spring of s...

    Text Solution

    |

  16. The magnetic flux phi (in weber ) in a closed circuit of resistance 10...

    Text Solution

    |

  17. The enegy of photon corresponding to a radiatio of wavelength 600 nm i...

    Text Solution

    |

  18. Calculate the angular momentum of the electron in third orbit of hydro...

    Text Solution

    |

  19. The half-life of a radioactive substance is 10 days. The time taken fo...

    Text Solution

    |

  20. The current amplificationn factor for a transistor in its common emitt...

    Text Solution

    |