Home
Class 12
PHYSICS
In a uniform magneitc field of induced B...

In a uniform magneitc field of induced B a wire in the form of a semicircle of radius r rotates about the diameter of hte circle with an angular frequency `omega`. The axis of rotation is perpendicular to hte field. If the total resistance of hte circuit is R, the mean power generated per period of rotation is

A

`(Bpir^(2)omega)/(2R)`

B

`((Bpir^(2)omega)^(2))/(5Rt)`

C

`((Bpiromega)^(2))/(2R)`

D

`((Bpir omega^(2))^(2))/(8R)`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • NTA JEE MOCK TEST 84

    NTA MOCK TESTS|Exercise PHYSICS|25 Videos

  • NTA JEE MOCK TEST 86

    NTA MOCK TESTS|Exercise PHYSICS|25 Videos

Similar Questions

Explore conceptually related problems

In a uniform magneitc field of induced B a wire in the form of a semicircle of radius r rotates about the diameter of the circle with an angular frequency omega . The axis of rotation is perpendicular to the field. If the total resistance of the circuit is R, the mean power generated per period of rotation is

A wire is bent to form a semicircle of the radius a. The wire rotates about its one end with angular velocity omega . Axis of rotation is perpendicular to the plane of the semicircle . In the space , a uniform magnetic field of induction B exists along the aixs of rotation as shown in the figure . Then -

A wire is bent to form a semi-circle of radius a. The wire rotates about its one end with angular velocity omega . Axis of rotation being perpendicular to plane of the semicircle. In the space, a uniform magnetic field of induction exists along the axis of rotation as shown. The correct statement is

A circular wire of radius r rotates about its own axis with angular speed w in a magnetic field B perpendicular to its plane, then the induced e.m.f. is

A solid cylinder of mass M and radius R rotates about its axis with angular speed omega . Its rotational kinetic energy is

A wire shaped as a semi-circle of radius a rotates about sn sxis OO' with an angular velocity omega in a unifrom magnetic field of induction B' (Fig). The rotation axis is perpendicular to the field direction. The total resistance of the circuit is equal to R . NEglecting the magnetic field of the induced current, find the meand amount of thermal power being generated in the loop fueing a rotation period.

A conducting circular loop of raidus r is rotated about its diameter at a constant angular velocity omega in a magnetic field B perpendicular to the axis of rotation. In what position of the loop is the inducedj emf zero?

NTA MOCK TESTS-NTA JEE MOCK TEST 85-PHYSICS
  1. AB is a light rigid rod. Which is rotating about a vertical axis passi...

    Text Solution

    |

  2. In the circuit shown in the figure (A), R(3) is a variable resistance ...

    Text Solution

    |

  3. In a uniform magneitc field of induced B a wire in the form of a semic...

    Text Solution

    |

  4. An insulating solid sphere of the radius R is charged in a non - unifo...

    Text Solution

    |

  5. Assuming the Sun to be a spherical body of radius R at a temperature o...

    Text Solution

    |

  6. In a given process on an ideal gas, dW=0 and dQlt0. Then for the gas

    Text Solution

    |

  7. A horizontal metallic rod of mass 'm' and length 'l' is supported by t...

    Text Solution

    |

  8. A large , heavy box is sliding without friction down a smooth plane o...

    Text Solution

    |

  9. The friction coefficient between the board and the floor shown in figu...

    Text Solution

    |

  10. A particle at the end of a spring executes simple harmonic motion with...

    Text Solution

    |

  11. A photocell is illuminated by a small bright source places 1 m away w...

    Text Solution

    |

  12. A beam of light consisting of red, green and blue colours is incident ...

    Text Solution

    |

  13. A uniform rod of mass m and length L is hinged at one end and free to ...

    Text Solution

    |

  14. A particular semiconductor in equilibrium has 1xx10^(16)cm^(-3) donor ...

    Text Solution

    |

  15. The speed (v) of ripples on the surface of waterdepends on surface ten...

    Text Solution

    |

  16. The ratio of intensities of consecutive maxima in the diffraction patt...

    Text Solution

    |

  17. A string of length 1.5 m with its two ends clamped is vibrating in fun...

    Text Solution

    |

  18. The potential energy of a 1 kg particle free to move along the x- axis...

    Text Solution

    |

  19. The length of a magnet is large compared to its width and breadth. The...

    Text Solution

    |

  20. A statellite is launched into a circular orbit, (R )/(4) above the sur...

    Text Solution

    |