Home
Class 12
PHYSICS
the length of wire of diameter 0.5 mm ne...

the length of wire of diameter 0.5 mm needed to produce a coil of resistance `10Omega` and specific resistance `4.4xx10^(-7)Omega` m is

A

4.45 m

B

5.55 m

C

5.45 m

D

1.45 m

Text Solution

Verified by Experts

The correct Answer is:
A
`R= (rho l)/(A)`
`:.l=(10xx3.14xx25xx10^(-8))/(4.4xx10^(-7)xx4)=(78.5)/(17.6)=4.45`m
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    NIKITA PUBLICATION|Exercise Multiple Choice Questions|314 Videos

  • COMMUNICATION SYSTEMS

    NIKITA PUBLICATION|Exercise Multiple Choice Questions (Examples for Practice)|8 Videos

  • ELASTICITY

    NIKITA PUBLICATION|Exercise MCQ|314 Videos

Similar Questions

Explore conceptually related problems

What length of a wire of diameter 0.46 mm and specific resistance 50xx10^(-6) Omega m would be required to make a coil of resistance 10 Omega ?

What length of a copper wire of cross-sectional area 0.01 mm^2 will be needed to prepare a resistance of 1 kOmega ? Resistivity of copper = 1.7 xx 10^(-8) Omega m .

What is the length of a nichrome wire of radius 0.32 mm, resistance 9.3 Omega and resistivity 15 xx 10^(-6)Omega m ? If a potnetial differences of 10 V is applied across the wire, what will be the current in the wire ?

A wire of resistance 5.0 Omega is used to wind a coil of radius 5 cm. The wire has a diameter 2.0 mm and the specific resistance of its material is 2.0xx10^(-7)Omega m . Find the number of turns in the coil.

What should be the length of a nichrome wire of resistance 4.5 Omega , if the length of a similar wire is 60 cm and resistance 2.5 Omega ?

What is the length of a wire of radius 0.2 mm and resitance 25 Omega ? The restivity of the material of the wire is 2pi xx 10^(-8) Omega.m.

A wire of resistance 4 Omega is used to wind a coil of radius 7 cm. The wire has a diameter of 1.4 mm and the specific resistance of its material is 2xx10^(-7) Omega m . Find the number of turns in the coil.

Calculate the area of cross section of wire whose length is 10.0 m and resistance is 230 Omega take specific resistance of the material of wire as 1.84xx10^-6 ohm-m

A wire of length 1 m and radius 0.1mm gas a resistance of 100(Omega) .Find the resistivity of the material .

What length of the wire of specific resistance 48 xx 10^(-8) Omegam is needed to make a resistance of 4.2 Omega (diameter of wire = 0.4 mm )

NIKITA PUBLICATION-CURRENT ELECTRICITY-Multiple Choice Questions
  1. 12 resistors each of 10Omega are connected as shown in the figure. The...

    Text Solution

    |

  2. In the network shown in figure each resistance is 1 Omega. The effecti...

    Text Solution

    |

  3. the length of wire of diameter 0.5 mm needed to produce a coil of resi...

    Text Solution

    |

  4. The resistance of a wire of length 40 m and radius o.25 mm is 10 Omega...

    Text Solution

    |

  5. A wire of resistance 12Omega is stretched uniformly till its length be...

    Text Solution

    |

  6. A wire of resistance 16Omega is bent in to a circle and a cell of e.m....

    Text Solution

    |

  7. Two cells of e.m.f. 2.5 V and 2.0 V having internal resistance of 1Ome...

    Text Solution

    |

  8. Two cells of e.m.f. E(1) and E(2), E(1) gt E(2) having an internal res...

    Text Solution

    |

  9. Four resistances 1Omega, 2Omega, 2 Omega, and 4 Omega are connected so...

    Text Solution

    |

  10. Four resistances 3Omega, 6Omega, 4Omega, and 12Omega are connected so ...

    Text Solution

    |

  11. Two equal resistances are introduced in two gaps of a metre bridge. Th...

    Text Solution

    |

  12. With an unknown resistance X in the left gap and a resistance R in the...

    Text Solution

    |

  13. Two coils are connected in series in one gap of the Wheatstone's meter...

    Text Solution

    |

  14. With resistances P and Q in the left gap and right gap respectively, o...

    Text Solution

    |

  15. Two resistances prepared from the wire of the same material having dia...

    Text Solution

    |

  16. Equal lengths of wires A and B are connected the left and the right ga...

    Text Solution

    |

  17. A potentiometer wire is 500 cm long and potential difference of 4 V i...

    Text Solution

    |

  18. A steady voltage drop is maintained across a potentiometer wire which ...

    Text Solution

    |

  19. Two cells are connected in series and e.m.f. of combination is found t...

    Text Solution

    |

  20. The emf of cell is balanced by balancing length 450 cm . When the res...

    Text Solution

    |