Home
Class 12
PHYSICS
At a certain place a magnet makes 30 osc...

At a certain place a magnet makes 30 oscillations per minute. At another place where the magnetic field is doubled, its time period will be

A

`sqrt2 sec`

B

`2 sec`

C

`4 sec`

D

`1/2 sec`

Text Solution

Verified by Experts

The correct Answer is:
A

`Tprop1/sqrtB`
`T = T/sqrt2= ((60/30))/(sqrt2)=2/sqrt2=sqrt2 sec.`
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

The magnetic needle of a vibration magnetometer makes 12 oscillations per minute in the horizontal component of earth's magnetic field. When an external short bar magnet is placed at some line, it makes 15 oscillations per minute, If the poles of the bar magnet are interchanged, the number of oscillations it makes per minute is

A magnet freely suspended in a vibration magnetometer makes 40 osillations per' minute at place A and 20 oscillations per minute at a place B. If the horizonatal component of earth's magnetic field at A is 36xx10^(-6)T, then its value at B is

A bar magnet placed in a uniform magnetic field making an angle theta with the field experiences a torque. If the angle made by the magnet with the field is doubled, the torque experienced by the magnet increases by 41.4% . The initial angle made by the magnet with the magnetic field is

A small magnetic needle is set into oscillations in a magnetic field B obtain an expression for the time period of oscillation.

A short bar magnet of magnetic moment 0,21 A - m^(2) is placed with its axis perpendicular to the direction of the horizontal component of the earth 's magnetic field .The distance of the point on the axis of the magnet from the centre of the magnet where the resultant magnetic field is inclined at 45^(@) with the horizontal component of the earth's field direction is (horizontal component of the earth's magnetic field 4.2xx10^(-5)

SIA PUBLICATION-MAGNETISM-PROBLEMS
  1. A circular loop and a square loop are formed from two wires of same le...

    Text Solution

    |

  2. At a certain place a magnet makes 30 oscillations per minute. At anoth...

    Text Solution

    |

  3. Suppose that the electric flux inside a parallel plate capacitor chang...

    Text Solution

    |

  4. If the dielectric constant of a substance is K=4/3, then the electric ...

    Text Solution

    |

  5. Two long straight parallel conductors 10 cm apart, carry equal current...

    Text Solution

    |

  6. In a crossed field, the magnetic field induction is 2.OT and electric ...

    Text Solution

    |

  7. A material of 0.25 cm^(2) cross sectional area is placed in a magnetic...

    Text Solution

    |

  8. A steady current flows in a long wire. It is bent into a circular lopp...

    Text Solution

    |

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

    Text Solution

    |

  10. At a certain place, the angle of dip is 60^(@) and the horizontal com...

    Text Solution

    |

  11. A short bar magnet having magnetic moment 4 Am^(2), placed in a vibrat...

    Text Solution

    |

  12. A deflection magnetometer is adjusted and a magnet of magnetic moment ...

    Text Solution

    |

  13. A long curved conductor carries a current I(I is a vector ). A small c...

    Text Solution

    |

  14. If a bar magnet of pole strength m and magnetic moment M is cut equall...

    Text Solution

    |

  15. The frequency of vibration in a vibration magnetometer of the combinat...

    Text Solution

    |

  16. A short magnetic needle is pivoted in a uniform magnetic field of indu...

    Text Solution

    |

  17. In Thomson's experiment to determine e/m of an electron, it is found t...

    Text Solution

    |

  18. Two bar magnets A and B are placed one over the other and are allowed ...

    Text Solution

    |

  19. A bar magnet is 10 cm long is kept with its north (N) pole pointing no...

    Text Solution

    |

  20. A wires of length I is bent into a circular loop of radius R and loop ...

    Text Solution

    |