Home
Class 12
PHYSICS
If a rod of aluminium and other made of ...

If a rod of aluminium and other made of insulating material are released to fall in magnetic field, it is found that insulating rod falls faster than aluminium. Why?

Text Solution

Verified by Experts

When rods begin to fall then eddy currents are generated in the body of aluminum rod which tries to prevent it from falling by magnetic force but there is no eddy current induced in case of insulating material so there will not be any opposition to its motion. So insulating rod falls rapidly.
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    MODERN PUBLICATION|Exercise TOUGH & TRICKY PROBLEMS|14 Videos

  • ELECTROMAGNETIC INDUCTION

    MODERN PUBLICATION|Exercise NCERT FILE (NCERT TEXTBOOK EXERCISE)|10 Videos

  • ELECTROMAGNETIC INDUCTION

    MODERN PUBLICATION|Exercise PRACTICE PROBLEMS|25 Videos

  • ELECTRIC CHARGES AND FIELDS

    MODERN PUBLICATION|Exercise Chapter Practice Test|15 Videos

  • ELECTROMAGNETIC WAVES

    MODERN PUBLICATION|Exercise CHAPTER PRACTICE TEST|14 Videos

Similar Questions

Explore conceptually related problems

What happens if a rod of diameter material is placed in a nonuniform magnetic field ?

What happens if a rod of diamagnetic material suspended in a unifrom magnetic field?

Two rods, one of aluminium and other made of steel, having initial lenghts l_(1) and l_(2) are connected together to form a singel rod of length (l_(1)+l_(2)) . The coefficient of linear expansions for aluminium and steel are alpha_(a) and alpha_(s) respectively. If length of each rod increases by same amount when their tempertures are raised by t^(@)C , then find the ratio l_(1) (l_(1)+l_(2)) .

Two rods, one of aluminium and the other made of steel, having initial length l_1 and l_2 are connected together to from a single rod of length l_1+l_2. The coefficients of linear expansion for aluminium and steel are alpha_a and alpha_s and respectively. If the length of each rod increases by the same amount when their temperature are raised by t^0C, then find the ratio l_1//(l_1+l_2)

Two rods , one of aluminium and the other made of steel, having initial length l_(1) and l_(2) are connected together to from a sinlge rod of length l_(1)+l_(2) . The coefficient of linear expansion for aluminium and steel are alpha_(a) and alpha_(s) for AC and BC . If the distance DC remains constant for small changes in temperature,

A pivoted aluminium bar falls much more slowly through a small region containing a magnetic field then a similar bar of an insulating material. Explain.

A wire moves with some speed perpendicular to a magnetic field. Why is emf induced across the rod?

Two rods, one of iron and the other of aluminium, are heated to the same temperature. Then,

MODERN PUBLICATION-ELECTROMAGNETIC INDUCTION-CONCEPTUAL QUESTIONS
  1. What will be the sense of current in the two loops shown in figure for...

    Text Solution

    |

  2. Lenz's law is consistent with law of conservation of

    Text Solution

    |

  3. One metallic loop is placed inside non-uniform magnetic field. Will th...

    Text Solution

    |

  4. There is a straight wire suspended in magnetic field and there is a ri...

    Text Solution

    |

  5. Two circular coils A and B are facing each other as shown in figure. T...

    Text Solution

    |

  6. Can we use copper box to protect something from variable magnetic fiel...

    Text Solution

    |

  7. If a rod of aluminium and other made of insulating material are releas...

    Text Solution

    |

  8. Two circular loops of radius r and R (R gt gt r) are placed coaxially ...

    Text Solution

    |

  9. A conducting iron rod PQ is moving towards the positive Y-axis in a re...

    Text Solution

    |

  10. Two circular coils are placed adjacent to each other as shown in the f...

    Text Solution

    |

  11. A graph in plotted showing variation of magnetic flux with current for...

    Text Solution

    |

  12. How can we detect Earth's magnetic field using concept of electromagne...

    Text Solution

    |

  13. A conducting bar is placed on a U-shaped track in a region of uniform ...

    Text Solution

    |

  14. As the bar shown in figure moves in a direction perpendicular to the f...

    Text Solution

    |

  15. Why is it recommended not to wear metallic chains or other jewelleries...

    Text Solution

    |

  16. If a bar magnet is moved inside a toroid, will there be any induced em...

    Text Solution

    |

  17. Is it possible to construct a coil with negligible self-inductance?

    Text Solution

    |

  18. In what orientation, the mutual inductance associated with given two c...

    Text Solution

    |

  19. Why does induction stove heater cook food only in utensils made from f...

    Text Solution

    |

  20. A lamp in a circuit consisting of a coil of large number of truns and...

    Text Solution

    |