Home
Class 12
PHYSICS
A cylindrical long wire of radius R carr...

A cylindrical long wire of radius `R` carries a current `I` uniformly distributed over the cross sectional area of the wire. The magnetic field at a distance `x` from the surface inside the wire is

A

`(mu_0I)/(2pi(R-x)`

B

`(mu_0I)/(2pix)`

C

`(mu_0I)/(2pi(R+x))`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
D
From centre `r=(R-x)`
`B=mu_0/(2pi) I/R^2r=mu_0/(2pi) 1/R^2(R-x)`
Promotional Banner

Topper's Solved these Questions

  • MAGNETICS

    DC PANDEY|Exercise INTRODUCTORY EXERCISE|1 Videos

  • MAGNETICS

    DC PANDEY|Exercise SUBJECTIVE_TYPE|1 Videos

  • MAGNETICS

    DC PANDEY|Exercise MCQ_TYPE|1 Videos

  • MAGNETIC FIELD AND FORCES

    DC PANDEY|Exercise Medical entrance s gallery|59 Videos

  • MAGNETISM AND MATTER

    DC PANDEY|Exercise Medical gallery|1 Videos

Similar Questions

Explore conceptually related problems

A long thick conducting cylinder of radius 'R' carries a current uniformly distributed over its cross section :

A long, thick straight conductor of radius R carries current I uniformly distributed in its cross section area.The ratio of energy density of the magnetic field at distance R//2 from surface inside the conductor and outside the conductor is:

A long, straight wire of radius R carries a current distributed uniformly over its cross section. The magnitude of the magnetic field is

A long straight solid metal wire of radius R carries a current I, uniformly distributed over its circular cross-section. Find the magnetic field at a distance r from axis of wire (i) inside and (ii) outside the wire.

A long straight solid metal rod of radius 4cm carries a current 2A , uniformly distributed over its circular cross-section. Find the magnetic field induction at a distance 3cm from the axis of the wire.

A long straight wire of radius R carries a steady current which is uniformly distributed through the cross-section of the wire. The magnitudes of the magnetic field at distance r_(1) and r_(2) from the centre of the wire are B_(1) and B_(2) respectively. Then

A uniform current I is flowing in a long wire of radius R . If the current is uniformly distributed across the cross-sectional area of the wire, then

A long cylinder of wire of radius 'a' carries a current i distributed uniformly over its cross section. If the magnetic fields at distances rlta and Rgta from the axis have equal magnitude, then

A long, cylindrical wire of radius b carries a current i distributed uniformly over its cross section. Find the magnitude of the magnetic field at a point inside the wire at a distance a from the axis.

A long straight conducting solid cylindrical wire of radius R carries a steady current / that is uniformly distributed throughout the cross section of the wire. Choose the correct graph of magnetic field B versus r (where r is distance from the axis of the wire)

DC PANDEY-MAGNETICS-Exercise
  1. The figure shows a point PO on the axis of a circular loop carrying cu...

    Text Solution

    |

  2. In the figure, the curved part represents arc of a circle of radius x....

    Text Solution

    |

  3. A cylindrical long wire of radius R carries a current I uniformly dist...

    Text Solution

    |

  4. A circular loop carrying a current I is placed in the xy-plane as show...

    Text Solution

    |

  5. An electron has velocity v = (2.0 xx 10^6 m/s) hati + (3.0 x 10^6 m/s ...

    Text Solution

    |

  6. An electron moves through a uniform magnetic fiedl given by B=Bxhati+(...

    Text Solution

    |

  7. A particle with charge 7.80 muC is moving with velocity v = - (3.80 xx...

    Text Solution

    |

  8. Each of the lettered points at the corners of the cube as shown in Fig...

    Text Solution

    |

  9. An electron in the beam of a TV picture tube is accelerated by a poten...

    Text Solution

    |

  10. A deuteron (the nucleus of an isotope of hydrogen) has a mass of 3.34 ...

    Text Solution

    |

  11. A neutral particle is at rest in a uniform magnetic field B. At time t...

    Text Solution

    |

  12. An electron at point A in figure has a speed v0 = 1.41 xx 10^6 m/s. Fi...

    Text Solution

    |

  13. A proton of charge e and mass m enters a uniform magnetic field B = Bi...

    Text Solution

    |

  14. A proton moves at a constant velocity of 50 m/s along the x-axis, in u...

    Text Solution

    |

  15. A particle having mass m and charge q is released from the origin in a...

    Text Solution

    |

  16. Protons move rectilinearly in the region of space where there are unif...

    Text Solution

    |

  17. A wire of 62.0 cm length and 13.0 g mass is suspended by a pair of fle...

    Text Solution

    |

  18. A thin, 50.0 cm long metal bar with mass 750 g rests on, but is not at...

    Text Solution

    |

  19. In figure, the cube is 40.0 cm on each edge. Four straight segments of...

    Text Solution

    |

  20. Find the ratio of magnetic dipole moment and magnetic field at the cen...

    Text Solution

    |