Home
Class 12
PHYSICS
A perfectily diamagnetic sphere has a sm...

A perfectily diamagnetic sphere has a small spherical cavity at its centre, which is filled with a paramagentic substance. The whole system is places in a uniform magnetic field `vecB` Then the field inside the paramagnetic substance is

A

much larger than `|vecB|` but opposite to `vecB`

B

much larger than `|vecB|` but parallel to `vecB`

C

zero

D

`vecB`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • JEE MAINS

    JEE MAINS PREVIOUS YEAR ENGLISH|Exercise Chemistry|1 Videos

Similar Questions

Explore conceptually related problems

A diamagnetic substance when placed gently in a magnetic field moves

In a diagramatic sphere is a cavity is made it at its centre and now paramagnetic material is inserted in the cavity. the sphere is kept in an external magnetic field at centre

A paramagnetic substance of susceptibility 3 xx10^(-4) is placed in a magnetic field of 3xx 10^(-4)A m^(-1) . . Then , the intensity of magnetisation in units of A m^(-1) is

Draw magnetic field lines when (a) (i) diamagnetic ,(ii) paramagnetic substance is placed in an external magnetic field. Which magnetic property distinguishes this behaviour of the field lines due to the two substances ?

In Fig. there is a uniform conducting structure in which each small square has side a. The structure is kept in a uniform magnetic field B. Then the magnetic force on the structure will be

A bar of diamagnetic substance is placed in a magnetic field with its length making angle theta with the direction of the magnetic field. How will the bar behave ?

Depict the behaviour of magnetic field lines near(i) diamagnetic and (ii) paramagnetic substances. Justify, giving reasons.

Assertion In water, value of magnetic field decreases. Reason: Water is a diamagnetic substance. When diamagnetic material is placed in

A wooden cubical block ABCDEFG of mass m and side a is wrapped by a square wire loop of perimeter 4a, carying current I. The whole system is placed at frictionless horizontal surface in a uniform magnetic field vecB=B_0hatj as shown in fig. In this situation, normal force between horizontal surface and block passes through a point at a distance x from centre. Choose correct statement (s).

A rectangular conducting loop consists of two wires on two opposite sides of length l joined together by rods of length d. The wires are each of the same material but with cross-sections differing by a factor of 2. The thicker wire has a resistance R and the rods are of low resistance, which in turn are connected to a constant voltage source V_0 . The loop is placed in a uniform magnetic field B at 45^@ to its plane. Find tau , the torque exerted by the magnetic field on the loop about an axis through the centres of rods.

JEE MAINS PREVIOUS YEAR ENGLISH-JEE MAINS 2020-PHYSICS
  1. Dimension of solar constant is:

    Text Solution

    |

  2. Concentric metallic hollow spheres of radii R and 4R hold charges Q1 a...

    Text Solution

    |

  3. A perfectily diamagnetic sphere has a small spherical cavity at its ce...

    Text Solution

    |

  4. Hydrogen ion and singly ionized helium atom are accelerated , from res...

    Text Solution

    |

  5. Two light waves having the same wavelength lambda in vacuum are in pha...

    Text Solution

    |

  6. Which of the following will NOT be obsered when a multimeter ( ope...

    Text Solution

    |

  7. If a semiconductor photodiode can detect a photon with a maximum wave...

    Text Solution

    |

  8. A block of mass of 1.9 kg is at rest at the edge of a table , of...

    Text Solution

    |

  9. A calorimeter of water equivalent 20 g contains 180 g of water at...

    Text Solution

    |

  10. A body is moving unidirectionally under the influence of a source of c...

    Text Solution

    |

  11. A block of mass m attached to a massless spring is performing osci...

    Text Solution

    |

  12. The radius R of a nucleus of mass number A can be estimated by the ...

    Text Solution

    |

  13. To raise the temperature of a certain mass of gas by 50^(@)C at a co...

    Text Solution

    |

  14. The electric field of a plane electromagnetic wave propagating along t...

    Text Solution

    |

  15. An massless equilateral triangle EFG of side 'a' (As shown in figure) ...

    Text Solution

    |

  16. If minimum possible work is done by a refrigenator in converting 100 g...

    Text Solution

    |

  17. When an object is kept at a distance of 30cm from a concave mirror, th...

    Text Solution

    |

  18. A block starts moving up an inclined plane of inclination 30^@ with an...

    Text Solution

    |

  19. A current of 0.5 A is passed through the coil of a galvanometer haing ...

    Text Solution

    |

  20. A beam of plane polarised light of large cross - sectional area and un...

    Text Solution

    |