Home
Class 12
PHYSICS
A thin non-conducting ring mass m, radiu...

A thin non-conducting ring mass `m`, radius `a`, carrying a charge `q` can rotate freely about its own axis which is vertical. At the initial moment the ring was at rest and no magnetic field was present. At instant `t = 0`, a uniform magnetic field is switched on which is vertically downwards and increase with time according to the law `B = B_(0)t`. Neglecting magnetism induced due to totational motion of the ring. Now answer the following questions.
The angular acceleration of the ring and its direction of rotation as seen from above: if `E` is induced `e.m.f`

A

`(Eq)/(2m a)`, anticlockwise

B

`(Eq)/(m a)`, anticlockwise

C

`(2Eq)/(m a)`, clockwise

D

`(Eq)/(m a)` clockwise

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • ELECTRO MAGNETIC INDUCTION

    NARAYNA|Exercise Single Answer Questions Level -VI|13 Videos

  • ELECTRO MAGNETIC INDUCTION

    NARAYNA|Exercise Integer type questions|2 Videos

  • ELECTRO MAGNETIC INDUCTION

    NARAYNA|Exercise Single Answer Questions Level -V|11 Videos

  • ELECTRIC CHARGES AND FIELDS

    NARAYNA|Exercise EXERCISE -4|43 Videos

  • ELECTRO MAGNETIC WAVES

    NARAYNA|Exercise LEVEL-II(H.W)|14 Videos

Similar Questions

Explore conceptually related problems

A thin non-conducting ring mass m , radius a , carrying a charge q can rotate freely about its own axis which is vertical. At the initial moment the ring was at rest and no magnetic field was present. At instant t = 0 , a uniform magnetic field is switched on which is vertically downwards and increase with time according to the law B = B_(0)t . Neglecting magnetism induced due to totational motion of the ring. Now answer the following questions. The power developed by the forces acting on the ring, as a function of time :

A thin non conducting ring of mass m , radius a carrying a charge q can rotate freely about its own axis which is vertical. At the initial moment, the ring was at rest in horizontal position and no magnetic field was present. At instant t=0 , a uniform magnetic field is switched on which is vertically downward and increases with time according to the law B=B_0t . Neglecting magnetism induced due to rotational motion of ring. Angular acceleration of ring is

A thin non conducting ring of mass m , radius a carrying a charge q can rotate freely about its own axis which is vertical. At the initial moment, the ring was at rest in horizontal position and no magnetic field was present. At instant t=0 , a uniform magnetic field is switched on which is vertically downward and increases with time according to the law B=B_0t . Neglecting magnetism induced due to rotational motion of ring. The magnitude of an electric field on the circumference of the ring is

A thin non conducting ring of mass m , radius a carrying a charge q can rotate freely about its own axis which is vertical. At the initial moment, the ring was at rest in horizontal position and no magnetic field was present. At instant t=0 , a uniform magnetic field is switched on which is vertically downward and increases with time according to the law B=B_0t . Neglecting magnetism induced due to rotational motion of ring. The magnitude of induced emf of the closed surface of ring will be

A thin non conducting ring of mass m , radius a carrying a charge q can rotate freely about its own axis which is vertical. At the initial moment, the ring was at rest in horizontal position and no magnetic field was present. At instant t=0 , a uniform magnetic field is switched on which is vertically downward and increases with time according to the law B=B_0t . Neglecting magnetism induced due to rotational motion of ring. Find intantaneous power developed by electric force acting on the ring at t=1 s

A thin non-conducting ring of mass m carrying a charge q can freely rotate about its axis. At the initial moment, the ring was at rest and no magnetic field was present. Then a uniform magnetic field was switched on, which was perpendicular to the plane of the ring and increased with time according to a certain law: (dB)/(dt) = k . Find the angular velocity omega of the ring as a function of k .

A thin non-conducting ring of mass m carrying a charge q can freely rotate about its axis. At the initial moment the ring was at rest and no magnetic field was present. Then a practically unifrom magnetic field was switched on, which was perpendicular to the planeof the ring and increased with time according to a certain law B (t) , Find the angluar velocity omega of the ring as a function of the induction B(t) .

A thin non-conducting ring of mass m carrying a charge q can freely rotate about its axis. At t = 0 , the ring was at rest and no magnetic field was present. Then suddenly a magnetic field B was set perpendicular to the plane. Find the angular velocity acquired by the ring.

Magnetic field due to ring

A conducting ring of radius r having charge q is rotating with angular velocity omega about its axes. Find the magnetic field at the centre of the ring.

NARAYNA-ELECTRO MAGNETIC INDUCTION-Comprehension Type Questions
  1. A conductor of mass m and length l is sliding smoothly an two vertical...

    Text Solution

    |

  2. A conductor of mass m and length l is sliding smoothly an two vertical...

    Text Solution

    |

  3. A thin non-conducting ring mass m, radius a, carrying a charge q can r...

    Text Solution

    |

  4. A thin non-conducting ring mass m, radius a, carrying a charge q can r...

    Text Solution

    |

  5. Two capacitors of capacitance C and 3C are charged to potential differ...

    Text Solution

    |

  6. Two capacitors of capacitance C and 3C are charged to potential differ...

    Text Solution

    |

  7. Two capacitors of capacitance C and 3C are charged to potential differ...

    Text Solution

    |

  8. Switches S(1), S(2) remain open and switch S(3) remains closed for lon...

    Text Solution

    |

  9. Switches S(1), S(2) remain open and switch S(3) remains closed for lon...

    Text Solution

    |

  10. Switches S(1), S(2) remain open and switch S(3) remains closed for lon...

    Text Solution

    |

  11. In the shown figure, there are two long fixed parallel conducting rail...

    Text Solution

    |

  12. In the shown figure, there are two long fixed parallel conducting rail...

    Text Solution

    |

  13. In the shown figure, there are two long fixed parallel conducting rail...

    Text Solution

    |

  14. Six loops are formed of copper wire of the same cross-sectional area. ...

    Text Solution

    |

  15. Six loops are formed of copper wire of the same cross-sectional area. ...

    Text Solution

    |

  16. Six loops are formed of copper wire of the same cross-sectional area. ...

    Text Solution

    |

  17. In an LR circuit connected to a battery, the rate at which energy is s...

    Text Solution

    |

  18. In the circuit shown in Fig. switch k(2) is open and switch k(1) is cl...

    Text Solution

    |

  19. Two infinitely long conducting parallel rails are connected through a ...

    Text Solution

    |

  20. Figure shows an isosceles triangle wire frame with apex angle equal to...

    Text Solution

    |