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

`((Bpi r^(2)omega)^(2))/(4R)`

C

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

D

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

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    AAKASH INSTITUTE|Exercise Assignment (SECTION - B)|8 Videos

  • ELECTROMAGNETIC INDUCTION

    AAKASH INSTITUTE|Exercise Assignment (SECTION - C)|4 Videos

  • ELECTROMAGNETIC INDUCTION

    AAKASH INSTITUTE|Exercise Try Yourself|41 Videos

  • ELECTRIC CHARGES AND FIELDS

    AAKASH INSTITUTE|Exercise SECTION -J(Aakash Challengers Questions)|5 Videos

  • ELECTROMAGNETIC WAVES

    AAKASH INSTITUTE|Exercise ASSIGNMENT SECTION - D Assertion-Reason Type Questions|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?

AAKASH INSTITUTE-ELECTROMAGNETIC INDUCTION-Assignment (SECTION - A)
  1. Two circular coils have their centres at the same point. The mutual in...

    Text Solution

    |

  2. When a battery is connected across a series combination of self induct...

    Text Solution

    |

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

    Text Solution

    |

  4. A metal conductor of length 1m rotates vertically about one of its end...

    Text Solution

    |

  5. A copper disc of radius 0.1 m is roated about its centre with 20 revol...

    Text Solution

    |

  6. Two coils of self-inductance 2mH and 8 mH are placed so close togethe...

    Text Solution

    |

  7. The equivalent quantity of mass in electricity is

    Text Solution

    |

  8. Dimensional formula of self-inductance is

    Text Solution

    |

  9. A time varying magnetic flux passing through a coil is given by phi=xt...

    Text Solution

    |

  10. A metalic ring is dropped down, keeping its plane perpendicular to a c...

    Text Solution

    |

  11. Lights of a car become dim when the starter is opereterd. Why?

    Text Solution

    |

  12. Coefficient of coupling between two coils of self-inductances L(1) and...

    Text Solution

    |

  13. There is a uniform magnetic field directed perpendicular and into the ...

    Text Solution

    |

  14. A square loop of wire with side length 10 cm is placed at angle of 45^...

    Text Solution

    |

  15. A uniformly wound solenoid coil of self inductance 1.8xx10^(-4)H and r...

    Text Solution

    |

  16. The magnitude opf the earth's magnetic field at a place is B(0) and th...

    Text Solution

    |

  17. Two parallel rails of a railway track insulated from each other and wi...

    Text Solution

    |

  18. Answer the following questions : (a) When a low flying aircraft pass...

    Text Solution

    |

  19. Electric field induced by changing magnetic fields are

    Text Solution

    |

  20. A circular loop of radius R, carrying current I, lies in x-y plane wit...

    Text Solution

    |