Home
Class 12
PHYSICS
What are permanent magnets ? Give any on...

What are permanent magnets ? Give any one practical application of permanent magnets.

Text Solution

Verified by Experts

Substances which at room temperature retain their ferromagnetic property for a long period of time are called permanent magnets. Permanent magnets are used is moving coil galvanometers dynamos and motors.
Promotional Banner

Topper's Solved these Questions

  • MAGNETISM AND MATTER

    SUBHASH PUBLICATION|Exercise THREE MARKS QUESTIONS WITH ANSWERS|13 Videos

  • MAGNETISM AND MATTER

    SUBHASH PUBLICATION|Exercise FIVE MARKS QUESTIONS WITH ANSWERS|2 Videos

  • MAGNETISM AND MATTER

    SUBHASH PUBLICATION|Exercise NUMERICALS WITH SOLUTIONS|12 Videos

  • II PUC ANNUAL EXAMINATION QUESTION PAPER MARCH 2019

    SUBHASH PUBLICATION|Exercise QUESTION|34 Videos

  • MODEL QUESTION PAPER

    SUBHASH PUBLICATION|Exercise PART - D|11 Videos

Similar Questions

Explore conceptually related problems

Give any three practical applications of electromagnets.

Materials of permanent magnet has

Write any two practical applications of optical fibres.

Explain any two practical applications of auxins.

Give any two practical limitations of Ohm's law.

Write any two practical applications of Pascal's law.

Give two practical applications of reflection of sound waves.

SUBHASH PUBLICATION-MAGNETISM AND MATTER -TWO MARKS QUESTIONS WITH ANSWERS
  1. What are electromagnets ?

    Text Solution

    |

  2. Write the relation between B(E), B(H) "and" B(V) along with an appropr...

    Text Solution

    |

  3. What do magnetic lines of force represent ?

    Text Solution

    |

  4. Why is that any two magnetic lines of force do not intersect with each...

    Text Solution

    |

  5. How are the magnetic lines of force aligned in an uniform magnetic fie...

    Text Solution

    |

  6. Say whether the magnetic dipole moment is a scalar or a vector quantit...

    Text Solution

    |

  7. Give the expression for the magnitude of magnetic flux density along t...

    Text Solution

    |

  8. Give the expression for torque acting on a magnetic dipole placed in a...

    Text Solution

    |

  9. Give the expression for magnetic potential energy and the meaning of t...

    Text Solution

    |

  10. Give the expression for period of oscillation of a magnctic dipole ( m...

    Text Solution

    |

  11. State Gauss's law in magnetism and write the same in the mathmatical f...

    Text Solution

    |

  12. Magnetic field arises due to charges in motion. Can a system have magn...

    Text Solution

    |

  13. Give the location of earth's magnetic dipole.

    Text Solution

    |

  14. Define magnetic susceptibility of a substance. Mention the SI unit of ...

    Text Solution

    |

  15. Give the expression for total magnetic flux associated with the magnet...

    Text Solution

    |

  16. What are permanent magnets ? Give any one practical application of per...

    Text Solution

    |

  17. What are magnetic elements of the Earth?

    Text Solution

    |

  18. Why does a paramagnetic sample display greater magnetisation ( for the...

    Text Solution

    |

  19. What are horizontal and vertical components of earth's total magnetic ...

    Text Solution

    |