Home
Class 12
PHYSICS
A metallic rod of length 'l' is tied to ...

A metallic rod of length 'l' is tied to a string of length 2l and made to rotate with angular speed w on a horizontal table with one end of the string fixed. If there is a vertical magnetic field 'B' in the region, the e.m.f. Induced across the ends of the rod is

A

`(2Bomegal^(2))/(2)`

B

`(3Bomegal^(2))/(2)`

C

`(4Bomegal^(2))/(2)`

D

`(5Bomegal^(2))/(2)`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    TARGET PUBLICATION|Exercise EVALUATION TEST|8 Videos
  • ELECTROMAGNETIC INDUCTION

    TARGET PUBLICATION|Exercise CRITICAL THINKING|84 Videos
  • ELASTICITY

    TARGET PUBLICATION|Exercise Evaluation test|14 Videos
  • ELECTROSTATICS

    TARGET PUBLICATION|Exercise EVALUATION TEST|14 Videos

Similar Questions

Explore conceptually related problems

A conducting rod of length 2l is rotating with constant angular speed w about its perpendicular bisector. A uniform magnetic field B exists parallel to the axis of rotation. The e.m.f. induced between two ends of the rod is

A sphere of mass m is tied to end of a string of length l and rotated through the other end along a horizontal circular path with speed v . The work done in full horizontal circle is

A glass rod of length l moves with velocity in a uniform magnetic field B. What is the e.m.f. induced in the rod ?

A stone tied to a string of length l is whirled in a horizontal circle at a constant angular speed omega in a circle of radius r. If the string makes an angle theta with vertical then the tension in the string is :

A stone of mass m tied to a string of length l is rotated in a circle with the other end of the string as the centre. The speed of the stone is v. If the string breaks, the stone will move

A metallic rod of length l is rotated at a constant angular speed omega , normal to a uniform magnetic field B. Derive an expression for the current induced in the rod, if the resistance of the rod is R.

A metallic rod of length L rotates at an angular speed omega, normal to a uniform magnetic field. If the resitance of rod is R the heat dissipated is:

TARGET PUBLICATION-ELECTROMAGNETIC INDUCTION-COMPETITIVE THINKING
  1. Alternating current of peak value ((2)/(pi)) ampere flows through the ...

    Text Solution

    |

  2. A conducting circular loop is placed in a uniform magnetic field, B=0....

    Text Solution

    |

  3. A metallic rod of length 'l' is tied to a string of length 2l and made...

    Text Solution

    |

  4. A rod of 10 cm length is moving perpendicular to uniform magnetic fiel...

    Text Solution

    |

  5. A wire loop is rotated in magneitc field. The frequency of change of d...

    Text Solution

    |

  6. A small square loop of wire of side l is placed inside a large square ...

    Text Solution

    |

  7. The current (I) in the inductance is varying with time according to th...

    Text Solution

    |

  8. When the frequency of the ac voltage applied to a series LCR circuit i...

    Text Solution

    |

  9. Assertion : An emf vec(E) is induced in a closed loop where magnetic f...

    Text Solution

    |

  10. In an AC circuit containing only capacitance the current

    Text Solution

    |

  11. A coil has resistance 30 ohm and inductive reactance 20 ohm at 50 Hz f...

    Text Solution

    |

  12. A resistor 20Omega, inductive reactance 15Omega and capacitive reactan...

    Text Solution

    |

  13. Same current is flowing in two alternating circuits. The first circuit...

    Text Solution

    |

  14. An electric heater consumes 1 kilowatt power when connected across a 1...

    Text Solution

    |

  15. An ac ammeter is used to measure currnet in a circuit. When a given di...

    Text Solution

    |

  16. A transmitter transmits at a wavelength of 300 m. A condenser of capac...

    Text Solution

    |

  17. In an electrical circuit R,L,C and an AC voltage source are all connec...

    Text Solution

    |

  18. An AC voltage source of variable angular frequency (omega) and fixed a...

    Text Solution

    |

  19. A bulb is connected first with DC and the then AC of same voltage then...

    Text Solution

    |

  20. The average power is dissipated in a pure inductor is

    Text Solution

    |