Home
Class 12
PHYSICS
A copper disc of the radius 0.1 m is rot...

A copper disc of the radius 0.1 m is rotated about its centre with 20 revolutions per second in a uniform magnetic field of 0.1 T with its plane perpendicular to the field. The emf induced across the radius of the disc is-

A

`(pi)/(20)`vilt

B

`20pi` millivolt

C

`2pi` mV

D

`20pi mu V`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    AAKASH INSTITUTE ENGLISH|Exercise Assignment (SECTION - B)|22 Videos

  • ELECTROMAGNETIC INDUCTION

    AAKASH INSTITUTE ENGLISH|Exercise Assignment (SECTION - C)|10 Videos

  • ELECTROMAGNETIC INDUCTION

    AAKASH INSTITUTE ENGLISH|Exercise Try Yourself|42 Videos

  • ELECTRIC CHARGES AND FIELDS

    AAKASH INSTITUTE ENGLISH|Exercise comprehension|3 Videos

  • ELECTROMAGNETIC WAVES

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT SECTION - D Assertion-Reason Type Questions|25 Videos

Similar Questions

Explore conceptually related problems

A copper disc of radius 0.1 m is roated about its centre with 20 revolutions per second in a uniform magnetic field of 0.1 T with its plane perpendicular the field. The emf induced across the radius of disc is

A copper disc of radius 0.1 m is rotated about its natural axis with 10 rps in a uniform magnetic field of 0.1 T with its plane perpendicular to the field, The emf induced across the radius of the disc is

A conducting ring is placed in a uniform magnetic field with its plane perpendicular to the field . An emf is induced in the ring if

A copper disc of radius 1 m is rotated about its natural axis with an angular velocity 2 rad/sec in a uniform magnetic field of 5 tesla with its plane perpendicular to the field. Find the emf induced between the centre of the disc and its rim.

A coil is rotated in a uniform magnetic field about an axis perpendicular to the field. The emf induced in the coil would be maximum when the plane of coil is :

A copper rod of length 2m is rotated with a speed of 10 rps, in a uniform magnetic field of 1 tesla about a pivot at one end. The magnetic field is perpendicular to the plane of rotation. Find the emf induced across its ends

A straight conductor 0.1 m long moves in a uniform magnetic field 0.1 T. The velocity of the conductor is 15ms^(-1) and is directed perpendicular to the field. The emf induced between the two ends of the conductor is

A semicircular conducting wire of radius a is moving perpendicular to a uniform magnetic field B with speed √2 v as shown in the figure.The emf induced across the wire Is

A copper rod of length 2m is rotated with a speed of 10 rps, in a uniform magnetic field of T tesla about a pivot at one end. The magnetic field is perperndicular to the plane of rotation. Find the emf induced across its ends

A circular copper disc 100cm in radius rotates at 20pi "rad"//s about an axis through its centre and perpendicular to the disc. A uniform magnetic field of 0.2T acts perpendicular to the disc. Calculate the potential difference developed between the axis of the disc and the rim

AAKASH INSTITUTE ENGLISH-ELECTROMAGNETIC INDUCTION-Assignment (SECTION - A)
  1. In a uniform magnetic field B a wire in the form of a semicircle of ra...

    Text Solution

    |

  2. A metal conductor of length 1 m rotates vertically about one of its en...

    Text Solution

    |

  3. A copper disc of the radius 0.1 m is rotated about its centre with 20 ...

    Text Solution

    |

  4. Two coils of self-inductance 2 mH and 8 mH are placed, so close togeth...

    Text Solution

    |

  5. As a result of change in the magnetic flux linked to the closed loop s...

    Text Solution

    |

  6. An inductor (L = 100 mH), a resistor (R = 100Omega) and a battery (E =...

    Text Solution

    |

  7. The equivalent quantity of mass in electricity is

    Text Solution

    |

  8. In the circuit shown in figure, power generated in

    Text Solution

    |

  9. Dimensional formula of self-inductance is

    Text Solution

    |

  10. A time varying magnetic flux passing through a coil is given by phi=xt...

    Text Solution

    |

  11. A metallic ring is dropped down, keeping its plane perpendicular to a ...

    Text Solution

    |

  12. Lights of a car become dim when the starter is operated. Why?

    Text Solution

    |

  13. Coefficient of coupling between two coils of self-inductances L(1) and...

    Text Solution

    |

  14. There is uniform magnetic field directed perpendicular and into the pl...

    Text Solution

    |

  15. A square loop of wire with side length 10 cm is placed at angle of 45^...

    Text Solution

    |

  16. Near a circular loop of conducing wires as shown, an electron moves al...

    Text Solution

    |

  17. A uniformly wound solenoid coil of self inductance 1.8xx10^(-4)H and r...

    Text Solution

    |

  18. The magnitude of the earth's magnetic field at a place is B(0) and an...

    Text Solution

    |

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

    Text Solution

    |

  20. When a low flying aircraft passes overhead, we sometimes notice a slig...

    Text Solution

    |