Home
Class 12
PHYSICS
A conductor of length L is rotated about...

A conductor of length L is rotated about an axis passing through one end of it with an angular velocity `omega` in a normal and uniform magnetic field B. The emf induced between its end will be -

A

`omega BL^2`

B

`(omega BL^2)/(2)`

C

`omega BL^2`

D

`omega BL`

Text Solution

Verified by Experts

The correct Answer is:
B

`V = 1/2 B omega l^2`
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    PHYSICS WALLAH|Exercise NEET PAST 5 YEARS QUESTIONS |10 Videos
  • ELECTROMAGNETIC INDUCTION

    PHYSICS WALLAH|Exercise NEET PAST 5 YEARS QUESTIONS |10 Videos
  • ELECTRIC CHARGES AND FIELDS

    PHYSICS WALLAH|Exercise NEET PAST 5 YEARS QUESTIONS |7 Videos
  • ELECTROMAGNETIC WAVES

    PHYSICS WALLAH|Exercise NEET Past 5 Years Questions|8 Videos

Similar Questions

Explore conceptually related problems

A metal rod of length 15xx10^(-2)m rotates about an axis passing through one end with a uniform angular velocity of 60 rad s^(-1) . A uniform magnetic field of 0.1 Tesla exisits in the direction of the axis of rotationn. Calculate the EMF induced between the ends of the rod.

A conducting rod of length l is rotating with constant angular velocity omega about point O in a uniform magnetic field B as shown in the figure . What is the emf induced between ends P and Q ?

A non-conducting disk of radius R is rotating about its own axis with constant angular velocity omega in a perpendicular uniform magnetic field B as shown in figure. The emf induced between centre and rim of disk is

An annular circular brass disk of inner radius 'r' and outer radius 'R' is rotating about an axis passing through its centre and perpendicular to its plane with a uniform angular velocity 'omega' in a uniform magnetic filed of induction 'B' normal to the plane of the disk. The induced emf between the inner and outer edge of the annular disk is

A conducting wheel in which there are four rods of lengthe l as shown in figure is rotating with angular velocity omega in a uniform magnetic field B. The induced potential difference between its centre and rim will be

a semicircle wire of radius R is rotated with constant angular velocity about an axis passing through one end and perpendicular to the plane of wire. There is a uniform magnetic field of strength B . The induced emf between the ends is

A horizontal ring of radius r spins about its axis with an angular velocity omega in a uniform vertical magnetic field of magnitude B . The emf induced in the ring is

A wheel with 10 spokes each of length 'L' m is rotated with a unifrom angular velocity omega in a plane normal to the magnetic field 'B' . The emf induced between the axle and the rim of the wheel.

PHYSICS WALLAH-ELECTROMAGNETIC INDUCTION -LEVEL - 2
  1. A two metre wire is moving with a velocity of 1 m/sec perpendicular to...

    Text Solution

    |

  2. An aeroplane, in which the distance between the tips of thie wings is ...

    Text Solution

    |

  3. A 0.4 meter long straight conductor moves in a magnetic field of magne...

    Text Solution

    |

  4. If a 10 m long metallic bar moves in a direction at right angles to th...

    Text Solution

    |

  5. A metallic rod completes its circuit as shown in the figure. The circu...

    Text Solution

    |

  6. A conductor of length L is rotated about an axis passing through one e...

    Text Solution

    |

  7. A metal rod of length L is placed normal to a magnetic field and rotat...

    Text Solution

    |

  8. A rectangular coil ABCD is rotated anticlockwise with a uniform angula...

    Text Solution

    |

  9. An AC generator of 220 V having internal resistance r=10 Omega and ext...

    Text Solution

    |

  10. A metallic conductor of 1m length is rotated verically its one end at ...

    Text Solution

    |

  11. A rectangular coil has 60 turns and its length and width is 20 cm and ...

    Text Solution

    |

  12. A coil of 100 turns having an average area of 100 cm^2 for each turn i...

    Text Solution

    |

  13. If the length and area of cross-section of an inductor remain same but...

    Text Solution

    |

  14. When current flowing in a coil changes from 3A to 2A in one millisecon...

    Text Solution

    |

  15. The equivalent inductance of two inductances is 2.4 henry when connect...

    Text Solution

    |

  16. Two coils A and B having turns 300 and 600 respectively are placed nea...

    Text Solution

    |

  17. If a coil of 40 turns and area 4.0 cm^(2) is suddenly remove from a m...

    Text Solution

    |

  18. A transformer has 50 turns in the primary and 100 in the secondary. If...

    Text Solution

    |

  19. A transformer has 50 turns in the primary and 100 in the secondary. If...

    Text Solution

    |

  20. A transformer of efficiency 90% has turns ratio 10 : 1. If the voltage...

    Text Solution

    |