Home
Class 12
PHYSICS
The effect due to uniform magnetic field...

The effect due to uniform magnetic field on a freely suspended magnetic needle is as follows

A

Both torque and net force are present

B

Torque is present but no net force

C

Both torque and net force are absent

D

Net force is present. But no torque

Text Solution

Verified by Experts

The correct Answer is:
B
The net force on a magnetic needle when placed in a uniform magnetic field is zero.
Promotional Banner

Topper's Solved these Questions

  • LAWS OF MOTION

    SIA PUBLICATION|Exercise M.C.Q|41 Videos

  • MECHANICAL PROPERTIES OF SOLIDS AND FLUIDS

    SIA PUBLICATION|Exercise M.C.Q.|107 Videos

Similar Questions

Explore conceptually related problems

Draw the magnetic field lines in uniform magnetic field.

The magnetic force on a current carrying wire placed in uniform magnetic field if the wire is oriented perpendicular to magnetic field is

A bar magnet of magnetic moment 1.5 JT^(-1) lies aligned with the direction of a uniform magnetic field of 0.22 T. magnetic moment : (i) normal to the field direction, (ii) opposite to the field direction ?What is the torque on the magnet in cases (i) and (ii) ?

Are there any sources of magnetic field other than magnets?

When will be the magnetic field uniform?

A magnetised needle in a uniform magnetic field experiences a torque but no net force. An iron nail near a bar magnet, however, experiences a force of attraction in addition to a torque. Why ?

A positivively charged particle moving due east enters a region of uniform magnetic field directed vertically upwards. The particle will

(A) : An electron moving with uniform velocity enters uniform magnetic field perpendicularly and then a uniform electric field in the same direction. Nature of paths followed by electron in both the fields will be same. (R) : The force applied by magnetic and electric field on electron are in the same direction.

What are the units of magnetic moment, magnetic induction and magnetic field ?

A short magnetic needle is pivoted in a uniform magnetic field of induction IT. Now, simultaneously another magnetic field of induction sqrt3 T is applied at right angles to the first field , the needle defects through an angle theta whose value is

SIA PUBLICATION-MAGNETISM-PROBLEMS
  1. A bar magnet of magnetic moment M and moment of inertia I is freely su...

    Text Solution

    |

  2. An electrically charged particle enters into a uniform magnetic induct...

    Text Solution

    |

  3. The effect due to uniform magnetic field on a freely suspended magneti...

    Text Solution

    |

  4. Two short magnets AB and CD are in the xy-plane and are parallel to X-...

    Text Solution

    |

  5. Two parallel rails of a railway track insulated from each other and wi...

    Text Solution

    |

  6. Magnetic field induction at the centre of a circular coil of radius 5 ...

    Text Solution

    |

  7. With a standard rectangular bar magnet of length (l), breadth (b,bltlt...

    Text Solution

    |

  8. If two identical bar magnets, each of length I, pole strength m and ma...

    Text Solution

    |

  9. A wire of length l is bent into a circular coil of one turn of radius ...

    Text Solution

    |

  10. The magnetic induction and the intensity of magnetic field inside an i...

    Text Solution

    |

  11. The magnetic needle of a vibration magnetometer makes 12 oscillations ...

    Text Solution

    |

  12. Magnetic induction at the centre of a circular loop of area pim^(2) is...

    Text Solution

    |

  13. A long straight wire carrying a current of 30 A is placed in an extern...

    Text Solution

    |

  14. Two ions having masses in the ratio 1:1 and charges 1:2 are projected ...

    Text Solution

    |

  15. A vibration magnetometer consists of two identical bar magnets placed ...

    Text Solution

    |

  16. The magnetic susceptibility of the material of rod is 499. Permeabilit...

    Text Solution

    |

  17. An electron revolves in a circle of radius 0.4 A with a speed of 10^(6...

    Text Solution

    |

  18. A proton of velocity (3hati+2hatj)ms^(-1) enters a field of magnetic i...

    Text Solution

    |

  19. A thin magnetic iron rod of length 30 cm is suspended in a uniform mag...

    Text Solution

    |

  20. Consider the following two statements A and B and identify the correct...

    Text Solution

    |