Home
Class 12
PHYSICS
Electric charge q is distributed uniform...

Electric charge `q` is distributed uniformly over a rod of length `l`. The rod is placed parallel to a ling wire carrying a current `i`. The separation between the rod and the wire is . The force needed to move the rod along its length with a uniform velocity `v` is

A

`(mu_0iqv)/(2pia)`

B

`(mu_0iqv)/(4pia)`

C

`(mu_0iqvl)/(2pia)`

D

`(mu_0iqvl)/(4pia)`

Text Solution

Verified by Experts

The correct Answer is:
A
`B=mu/(2pi)=i/a`
`F=Bqv sin90^@=mu_0/(2pi)i/a(qv)`
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    DC PANDEY|Exercise Level 2 More Than One Correct|10 Videos

  • ELECTROMAGNETIC INDUCTION

    DC PANDEY|Exercise Level 2 Comprehension Based|13 Videos

  • ELECTROMAGNETIC INDUCTION

    DC PANDEY|Exercise Level 1 Subjective|21 Videos

  • CURRENT ELECTRICITY

    DC PANDEY|Exercise Medical entrances gallery|97 Videos

  • ELECTROMAGNETIC WAVES

    DC PANDEY|Exercise Sec C|22 Videos

Similar Questions

Explore conceptually related problems

Electric charge q is uniformly distributed over a rod of length / The rod is placed parallel to a long wire carrying a current I The separation between the rod and the wire is a find the force needed to move the rod along its length with a uniform velocity v

A rod of length l is placed perpendicular to a long wire carrying current i . The rod is moved parallel to the wire with a velocity v . Find the emf induced in the rod, if its nearest end is at a distance a from the wire.

A rod of length l is placed perpendicular to a long wire carrying current i. The rod is moved parallel to the wire with a velocity v. Find the emf induced in the rod, if its nearest end is at a distance ‘a’ from the wire.

A rod of length l is kept parallel to a long wire carrying constant current i . It is moving away from the wire with a velocity v. Find the emf induced in the wire when its distance in the wire when its distance from the long wire is x .

Wire carrying a study current and rod AB are in the same plane the rod move parallel to wire with velocity v then which end of the rod is at higher potential.

A metal rod of length l cuts across a uniform magnetic field B with a velocity v. If the resistance of the circuit of which the rod forms a part is r, then the force required to move the rod is

A charge Q is uniformly distributed over a rod of length iota . Condider a hypothetical cube of edge iota with the centre of the cube at one end of the rod. Find the minimum possible flux of the electric field through the entire surface of the cube.

A rod CD of length b carrying a current I_(2) is placed in a magentic field due to a thin long wire AB carrying current I_(1) as shown in figure. Then find the net force experience by the wire

A positive charge Q is uniformly distributed across a rod of length L. The rod is then bent in the form of a semicircle. What will be the electric field intensity at the centre of curvature of the semicircle thus formed?

DC PANDEY-ELECTROMAGNETIC INDUCTION-Level 2 Single Correct
  1. Switch S is closed t=0, in the circuit shown. The change in flux in th...

    Text Solution

    |

  2. A coil having an inductance L and a resistance R is connected to a bat...

    Text Solution

    |

  3. Electric charge q is distributed uniformly over a rod of length l. The...

    Text Solution

    |

  4. AB is an infinitely long wire placed in the plane of rectangular coil ...

    Text Solution

    |

  5. PQ is an infinite current carrying conductor. AB and CD are smooth con...

    Text Solution

    |

  6. Find the flux of point charge q through the square surface ABCD as sho...

    Text Solution

    |

  7. Two circular loops P and Q are concentric and coplanar as shown in fig...

    Text Solution

    |

  8. In the circuit shown in figure, the switch S is closed at t=0. If VL i...

    Text Solution

    |

  9. In the figure shown as uniform magnetic field |B|=0.5T is perpendicula...

    Text Solution

    |

  10. The figure shows a non conducting ring of radius R carrying a charge q...

    Text Solution

    |

  11. A conducnting straight wire PQ of length l is fixed along as diameter ...

    Text Solution

    |

  12. A uniformly wound long solenoid of inductance L and resistance R is cu...

    Text Solution

    |

  13. When a choke coil carrying a steady current is short circuited, the cu...

    Text Solution

    |

  14. In the steady state condition the rate of heat produced in a choke coi...

    Text Solution

    |

  15. In the circuit shown in the figure initialy the switch in position 1 f...

    Text Solution

    |

  16. The figure shows an L-R circuit the time constant for the circuit is

    Text Solution

    |

  17. In figure, the switch is in the position 1 for long time, then the sw...

    Text Solution

    |

  18. In a decaying L-R circuit, the time after which energy stores in the i...

    Text Solution

    |

  19. Initially the switch is in positions 1 for as long time then shifted t...

    Text Solution

    |

  20. When the switch S is closed at t=0, identify the correct statement jus...

    Text Solution

    |