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 potential difference applied across them, so that the magnetic field at their centres is the same ?

A

3

B

4

C

6

D

2

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • MOVING CHARGE AND MAGNESIUM

    AAKASH INSTITUTE ENGLISH|Exercise SECTION D|16 Videos

  • MOVING CHARGE AND MAGNESIUM

    AAKASH INSTITUTE ENGLISH|Exercise SECTION B|17 Videos

  • MOTION IN STRAIGHT LINE

    AAKASH INSTITUTE ENGLISH|Exercise Assignment (SECTION - J)|2 Videos

  • MOVING CHARGES AND MAGNETISM

    AAKASH INSTITUTE ENGLISH|Exercise Assignment Section J (Aakash Challengers Questions)|5 Videos

Similar Questions

Explore conceptually related problems

Two circular coils are made from a uniform wire the ratio of radii of circular coils are 2.3 & no. of turns is 3:4. If they are connected in parallel across a battery. A.: Find ratio of magnetic induction at their centres. B: Find the ratio magnetic moments of 2 coils

A circular coil of n turns and radius r carries a current I. The magnetic field at the centre is

Two circular coils are made of two identicle wires of length 20 cm. One coil has number of turns 9 and the other has 3. If the same current flows through the coils then the ratio of magnetic fields of induclion at their centres is

Two circular coils are made from a uniform copper wire. Radii of circular coils is in the ratio 3:4 and number of turns in the ratio 3:5. If they are connected in series across a battery. Statement (A) : Ratio between magnetic field inductions at their centers is 4 : 5 Statement (B) : Ratio between effective magnetic moments of the two coils is 16 : 15

The resistance of a circular coil of 50 turns and 10 cm diameter is 5Omega . What must be the potential difference across the ends of the coil so as to nullify the earth's magnetic field (H=0.314 gauss) at the centre of the coil? How should the coil be placed to achieve this result?

A steady current is flowing in a circular coil of radius R, made up of a thin conducting wire. The magnetic field at the centre of the loop is B_L . Now, a circular loop of radius R//n is made from the same wire without changing its length, by unfounding and refolding the loop, and the same current is passed through it. If new magnetic field at the centre of the coil is B_C , then the ratio B_L//B_C is

A steady current is flowing in a circular coil of radius R, made up of a thin conducting wire. The magnetic field at the centre of the loop is B_L . Now, a circular loop of radius R//n is made from the same wire without changing its length, by unfounding and refolding the loop, and the same current is passed through it. If new magnetic field at the centre of the coil is B_C , then the ratio B_L//B_C is

Two circular coils made of similar wires but of radii 20 and 40cm are connected in parallel. Find the ratio of the magnetic fields at their centers.

A steady current flows in a long wire. It is bent into a circular lopp of one turn and the magnetic field at the centre of the coil is B. If the same wire is bent into a circular loop of n turns, the magnetic field at the centre of the coil is

A coil one turn is made of a wire of certain lenghth and then from the same length a coil of two turns is made. If the same current is passed both the cases, then the ratio of magnetic induction at there centres will be

AAKASH INSTITUTE ENGLISH-MOVING CHARGE AND MAGNESIUM-SECTION C
  1. A beam of electrons passes undeflected through uniformly perpendicul...

    Text Solution

    |

  2. In a mass spectrometer used for measuring the masses of ions, the ions...

    Text Solution

    |

  3. When a charged particle moving with velocity vec(V) is subjected to a...

    Text Solution

    |

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

    Text Solution

    |

  5. A coil in the shape of an equilateral triangle of side l is suspended ...

    Text Solution

    |

  6. Electric lines of force are as shown in the figure. Then potential at ...

    Text Solution

    |

  7. An electron moves in a circular orbit with a uniform speed v. It produ...

    Text Solution

    |

  8. A beam of electrons is moving with constant velocity in a region havin...

    Text Solution

    |

  9. A 10 eV electron circulating in a plane at right angle to a uniform fi...

    Text Solution

    |

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

    Text Solution

    |

  11. An electron having mass 'm' and kinetic energy E enter in uniform magn...

    Text Solution

    |

  12. A positive charge particle with charge q is moving with speed v in a r...

    Text Solution

    |

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

    Text Solution

    |

  14. The magnetic field dB due to a small element at a distance r and carry...

    Text Solution

    |

  15. Two equal electroic currents are flowing perpendicular to each other a...

    Text Solution

    |

  16. To convert a galvanometer into a voltmeter one should connect a : -

    Text Solution

    |

  17. A galvanometer having a coil resistance of 60 Omega shows full scale ...

    Text Solution

    |

  18. A straight wire of diametre 0.5 mm carrying a current of 1 A is replac...

    Text Solution

    |

  19. A closely wound solenoid of 2000 turns and area of cross-section 1.5xx...

    Text Solution

    |

  20. In an ammeter, 0.2% of min current passes through the galvanometer. If...

    Text Solution

    |