Home
Class 12
PHYSICS
Two circular coils 1 and 2 are made from...

Two circular coils 1 and 2 are made from the same wire but the radius of the 1st coil is twice that of the 2nd coil. What is the ratio of potentail difference applied across them so that the magnetic field at their centres is the same?

A

2

B

3

C

4

D

6

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • TEXTUAL QUESTIONS

    MODERN PUBLICATION|Exercise EXERCISE|507 Videos

  • STRUCTURE OF NUCLEUS

    MODERN PUBLICATION|Exercise EXERCISE|47 Videos

  • TEXUAL QUESTIONS

    MODERN PUBLICATION|Exercise EXERCISE|195 Videos

Similar Questions

Explore conceptually related problems

Two wire A & B are of the same metal and are of same length have area of cross section in the ratio of 2:1 If the same potential difference is applied across each wire. What will be the ratio of the current flowing through the wires A & B ?

A long wire carries a steady current. It is bent into a circle of one turn and the magnetic field at the centre of the coil is B. It is then bent into a circular loop of n turns. The magnetic field at the centre of the coil will be :

A circular coil 'A' has a radius R and the current flowing through it is I. Another circular coil 'B' has a radius 2R and if 2I is the current flowing through it, then the magnetic fields at the centre of the circular coil are in the ratio of

A circular coil of 50 turns and radius 0.2 cm carries a current of 12 A. Find magnetic field at the centre of the coil.

A long wire is first bent into a circular coil of one turn and then into a circular coil of smaller radius, having n identical turns. If the same current passes in both the cases, find the ratio of the magnetric fields produced at the centre in the two cases.

A circular coil of 20 turns and radius 10 cm is placed in a uniform magnetic field of 0.10 T normal to the plane of the coil. If the current in the coil is 5.0 A, what is the average force on each electron in the coil due to the magnetic field? (The coil is made of copper wire of cross-sectional area 10^-5 m^2 , and the free electron density in copper is given to be about 10^29 m^-3 .)

A circular coil of wire consisting of 100 turns, each of radius 8.0 cm carries a current of 0.40 A. What is the magnitude of the magnetic field B at the centre of the coil?

A long straight wire of radius a carries a steady current I. the current is uniformly distributed across it cross-section. The ratio of the magnetic field at a/2 and 2a is

A circular coil of wire consisting of 80 turns, each of radius 8 cm, carries a acurrent of 0.5 A. Calculate the magnitude of magnetic field B at the centre of the coil.

MODERN PUBLICATION-TEXTUAL QUESTIONS-EXERCISE
  1. Mangetic field intensity at the centre of a coil of 50 turns, radius 0...

    Text Solution

    |

  2. A circular coil 'A' has a radius R and the current flowing through it ...

    Text Solution

    |

  3. Two circular coils 1 and 2 are made from the same wire but the radius ...

    Text Solution

    |

  4. The magnetic field of a given length of wire carrying a current of a s...

    Text Solution

    |

  5. A long wire is first bent into a circular coil of one turn and then in...

    Text Solution

    |

  6. The magnetic field at a distance r from a long wire carryimg current I...

    Text Solution

    |

  7. A straight wire of diameter 0.5 mm carrying a current of 1 A is replac...

    Text Solution

    |

  8. Two long parallel wire P and W are both perpendicular to the plane of ...

    Text Solution

    |

  9. If a long copper rod carries a direct current, the magnetic field asso...

    Text Solution

    |

  10. A long solenoid carrying a current produces a magnetic field B along i...

    Text Solution

    |

  11. When a charged particle moves perpendicular to a magnetic field, then

    Text Solution

    |

  12. A positively charged particle moving due east enters a region of unifo...

    Text Solution

    |

  13. A charged particle moves with velocity vecv in a uniform magnetic fiel...

    Text Solution

    |

  14. When a charged particle moving with velocity vecv is subjected to a ma...

    Text Solution

    |

  15. The magnetic force acting on a charged particle of charge -2 muC in a ...

    Text Solution

    |

  16. Due to earth's magnetic field, the charged cosmic rays particles

    Text Solution

    |

  17. A uniform magnetic field acts right angles to the direction of motion ...

    Text Solution

    |

  18. Under the influence of a uniform magnetic field, a charged partile is ...

    Text Solution

    |

  19. An electron moves in a circular orbit with a uniform speed v.It produc...

    Text Solution

    |

  20. Calculate the wavelength associated with an electron moving with a vel...

    Text Solution

    |