Home
Class 12
PHYSICS
A thin semicircular conducting ring of r...

A thin semicircular conducting ring of radius R is falling with its plane vertical in a horizontal magnetic induction `vecB` as shown in the figure
At the position PQR, the speed of the ring is v. Then, the potential difference developed across the ring is

A

zero

B

`1/2 BvR^2` and M is at higher potential

C

2RBV and Q is at higher potential

D

zero

Text Solution

Verified by Experts

The correct Answer is:
2RBV and Q is at higher potential.
Promotional Banner

Topper's Solved these Questions

  • TEXTUAL QUESTIONS

    MODERN PUBLICATION|Exercise EXERCISE|507 Videos

  • STRUCTURE OF NUCLEUS

    MODERN PUBLICATION|Exercise EXERCISE|47 Videos

  • TEXUAL QUESTIONS

    MODERN PUBLICATION|Exercise EXERCISE|195 Videos

Similar Questions

Explore conceptually related problems

A thin semicircular conducting ring of radius R is falling with its plane vertical in a horizontal magnetic induction vecB . At the position MNQ, the speed of the ring is v. What is the potential difference developed across the ring at the position MNQ?

A positively charged thin metal ring of radius R is fixed in the xy plane with its centre at the origin O. A negatively charged particle P is released from rest at the point (0, 0, z_0 ) where z_0gt0 . Then the motion of P is

A magnet is suspended vertically from a fixed point by means of a spring, as shown in the figure. One end of the magnet hangs inside a coil of wire. The coil is connected in series with a resistance R. The magnet is displaced vertically a small distance D and the released. shown in the figure variation with time t of the vertical displacement d of the magnet from its equilibrium position. State and explain, by reference to electromagnetic induction, the nature of the oscillations of the magnet. Calculate the angular frequency omega_0 of the oscillations.

A copper ring having a cut such as not to form a complete loop is held horizontally and a bar magnet is dropped through the ring with its length along the axis of the ring. Then acceleration of the falling magnet is:

A thin circular ring of radius r is charged uniformaly so that its linear charge density becomes lambda . Derive an expression for the electric for the electric field at a point P at a distance x from it along the axis of the ring. Hence, prove that at large distances (x>>r), the ring behaves as a point charge.

A conducting square loop of side L and resistance R moves in its plane with a unifrom velocity v perpendicular to one of its sides. A magnetic induction B constant in time and space, pointing perpendicular and into the plane of the loop exists every where. the current induced in the loop is

A copper ring is suspended in a vertical plane by a thread. A steel bar is passed through the ring in a horizontal direction and then a magnet is similarly passed through. Will the motion of the bar and the magnet affect the position of the ring?

A metallic ring of mass m and radius l (ring being horizontal) is falling under gravity in a region having a magnetic field. If z is the vertical directoin, the z-component of magnitude field is B_z = B_0(1+lambda+lambdaz) . If R is the resistance of the ring and if the ring falls with a velocity v, find the energy lost in the resistacne. If the ring has reached a constant velocity, use the conversation of energy to determine v in terms of m, B, lambda and acceleration due to gravity g.

A magnetic field vecB is confined to a region r le a and points out of the paper (the z axis), r = 0 being the centre of the circular region. A charged ring (charge = Q) of radius b, b>a and mass m lies in the x-y plane with its centre at the origin. The ring is free to rotate and is at rest. the magnetic field is brought to zero in time Deltat . Find the angular velocity omega of the ring after the field vanishes.

A conducting rod of 1 m length is rotated with a frequency of 50 rev/s, with one end hinged at the centre and the other end at the circumference of a circular metallic ring of radius 1 m, about an axis passing through the centre and perpendicular to the plane of the ring. A constant and uniform magnetic field of 1 T parallel to the axis is present everywhere. What is the emf between the centre and the metallic ring?

MODERN PUBLICATION-TEXTUAL QUESTIONS-EXERCISE
  1. A thin semicircular conducting ring of radius R is falling with its pl...

    Text Solution

    |

  2. For current entering at A, the electric field E(r at a distance r form...

    Text Solution

    |

  3. A material 'B' has twice the specific resistance of 'A'. A circular wi...

    Text Solution

    |

  4. The length of a given cylindrical wire is increased by 100%. Due to th...

    Text Solution

    |

  5. If a wire is stretched to make it 0.1% longer, its resistance of will

    Text Solution

    |

  6. An electric current is passed through a circuit containing two wires o...

    Text Solution

    |

  7. By increasing the temperature, the specific resistance of a conductor ...

    Text Solution

    |

  8. A strip of copper another of germanium are cooled from room temperatur...

    Text Solution

    |

  9. The difference in the variation o resistance with temperature in a met...

    Text Solution

    |

  10. The thermistors are usually made of

    Text Solution

    |

  11. The resistance of a bulb filmanet is 100Omega at a temperature of 100^...

    Text Solution

    |

  12. The resistance of a wire is 5 ohm at 50^@C and 6 ohm at 100^@C. The re...

    Text Solution

    |

  13. The resistance of hot tungsten filament is about 10 times the cold res...

    Text Solution

    |

  14. An electric bulb is rated 220 V and 100 W. when it is operated on 110 ...

    Text Solution

    |

  15. An 220 volt-1000 watt bulb is connected across a 110 volt mains supply...

    Text Solution

    |

  16. A heater coil is cut into two equal parts and only one part is now use...

    Text Solution

    |

  17. If in the circuit, power dissipation is 150 W, then R is

    Text Solution

    |

  18. A wire when connected to 220 V mains supply has power dissipation P1. ...

    Text Solution

    |

  19. The resistance of the series combination of two resistances is S. WHen...

    Text Solution

    |

  20. A 3 V battery with negligible internal resistance is connected in a ci...

    Text Solution

    |

  21. What will be the value of current through 2Omega resistance for the ci...

    Text Solution

    |