Home
Class 12
PHYSICS
The magnetic field within a long, straig...

The magnetic field within a long, straight solenoid with a circular cross - section of radius r is (as shown) increasing at a rate of `alpha`.

The rate of change of flux through a circle with radius a inside the solenoid and with centre on the solenoid axis is

A

`sqrt2 pia^(2)alpha`

B

`(1)/(2)pia^(2)alpha`

C

`pia^(2)alpha`

D

`(3)/(2)pialpha`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • NTA JEE MOCK TEST 28

    NTA MOCK TESTS|Exercise PHYSICS|25 Videos

  • NTA JEE MOCK TEST 30

    NTA MOCK TESTS|Exercise PHYSICS|25 Videos

Similar Questions

Explore conceptually related problems

Magnetic field inside a long solenoid |Questions |Toroid

The magnitude of the magnetic field inside a long solenoid is increased by

Magnetic field B along the axis of a long solenoid is given by

The strength of magnetic field inside a long current-carrying straight solenoid is:

NTA MOCK TESTS-NTA JEE MOCK TEST 29-PHYSICS
  1. The following arrangement performs the logic function of

    Text Solution

    |

  2. A block of mass m is attached to one end of a light string which is wr...

    Text Solution

    |

  3. A ray of light is incident at the glass-water interface at an angle i ...

    Text Solution

    |

  4. A hemispherical bowl just floats without sinking in a liquid of densit...

    Text Solution

    |

  5. Two blocks of masses 5 kg and 10 kg are connected by a metal wire goin...

    Text Solution

    |

  6. A particle of mass 'm' is attached to three identical springs A,B and ...

    Text Solution

    |

  7. The x and y coordinates of a particle at any time t are given by x=7t+...

    Text Solution

    |

  8. The figure shows a current- carrying loop, some part of which is circu...

    Text Solution

    |

  9. The work of 146 kJ is performed in order to compress one kilo mole of ...

    Text Solution

    |

  10. A few spherical equipotential surfaces are shown in the figure. The el...

    Text Solution

    |

  11. The magnetic field within a long, straight solenoid with a circular cr...

    Text Solution

    |

  12. n identical cells are joined in series with two cells A and B with rev...

    Text Solution

    |

  13. Two circular concentric loops of radii r(1)=20cm, r(2)=30 cm are place...

    Text Solution

    |

  14. A spherical cavity is made in a lead sphere of radius R such that its ...

    Text Solution

    |

  15. Identify the missingf product in the given reaction ""(92)""^(235)U+""...

    Text Solution

    |

  16. In the adjacent diagram, CP represents a wavefront and AO & BP, the co...

    Text Solution

    |

  17. A silver of radius 1 cm and work function 4.7 eV is suspended from an ...

    Text Solution

    |

  18. An astronaut whose height is 1.50 m floats ''feet down'' in an orbitin...

    Text Solution

    |

  19. Charges Q, 2Q, and -Q are given to three concentric conducting spherei...

    Text Solution

    |

  20. Two batteries of different emfs and different internal resistances are...

    Text Solution

    |