Home
Class 12
PHYSICS
A coil 10 turns and area 10^(-2)m^(2) ro...

A coil 10 turns and area `10^(-2)m^(2)` rotates in a magnetic field of 0.25 tesla. If the maximum induced e.m.f. is 25 mV, then the angular speed of rotation of the coil will be

A

`0.5 rad//s`

B

`1 rad//s`

C

`2 rad//s`

D

`3 rad//s`

Text Solution

Verified by Experts

The correct Answer is:
B
`e_(max) = nAB omega`
`:. 25 xx 10^(-3) = 10 xx 10^(-2) xx 25 xx 10^(-2) xx omega`
`:. Omega = 1 rad//s`.
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENTS

    MARVEL PUBLICATION|Exercise TEST YOUR GRASP - 16|30 Videos

  • ELASTICITY

    MARVEL PUBLICATION|Exercise Test Your Grasp - 5|15 Videos

  • ELECTRONS AND PHOTONS

    MARVEL PUBLICATION|Exercise TEST YOUR GRASP - 17|15 Videos

Similar Questions

Explore conceptually related problems

The length of each side of a square coil of 10 turns is 10 cm. It rotates in a magnetic field of flux density 25 xx 10^(-3)T . If the maximum induced e.m.f. is 20 mV, then the angulare velocity of the coil will be

The length of each side of a square coil of 10 turns is 10 cm. This coil rotates in a magnetic field of induction 0.02 Tesla. If the maximum induced e.m.f. in the coil is 20 mV, then the angular velocity of the coil will be

A coil of 10 turns and area 4xx10^(-2)m^(2) is placed in a unifrom magnetic field of flux dencity 10^(-2)T .If it is removed completely in 0.5s ,then the induced in the coil is

A student peddles a stationary bicycle. The pedals are connected to a coil of 100 turns and area 0.1 m^(-2) . The coil is placed in a uniform magnetic field of 10^(-2) T , perpendicular to the axis of rotation of the coil. What is the maximum voltage generated in the coil if the coil rotates at 60 revolution per minute?

A rectangular coil of 200 turns and area 100 cm^(2) is kept perpendicular to a uniform magnetic field of induction 0.25 tesla. If the field is reversed in direction in 0.01 second, the average induced emf in the coil is

A rectangular coil of wire has dimensions 0.2 m xx 0.1 m . The coil has 2000 turns . The coil rotates in a magnetic field about an axis parallel to its length and peroendicular to the magnetic field fo 0.2 wb m^(-2) . The speed of rotation of the coil (ii) the instantaneous value of induced emf when the plane of the coil has rotated through an angle of 30 ^(@) from the initial position .

A coil of area 0.05 m^(2) and 500 turns is placed in a magnetic field of strength 4 xx 10^(-5) tesla. If it is rotated through 90^(@) in 0.1 sec, then the magnitude of e.m.f. Induced in the coil will be

A 100 turn coil of area 0.1 m^(2) rotates at half a revolution per second. It is placed in a magnetic field of 0.01 T perpendicular to the axis of rotation of the coil. Calculate the maximum voltage generated in the coil.

MARVEL PUBLICATION-ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENTS -TEST YOUR GRASP - 16
  1. A step down transformer has a turn ratio of 20 : 1. If 8 volt are deve...

    Text Solution

    |

  2. A step down transformer of efficiency 80% is used on a 1000V line to d...

    Text Solution

    |

  3. A coil 10 turns and area 10^(-2)m^(2) rotates in a magnetic field of 0...

    Text Solution

    |

  4. An alternating e.m.f. is given by E=10 cos omega t. If the frequency i...

    Text Solution

    |

  5. In an A.C. Circuit, the current is given by I=6 sin(200 pi t+(pi)/6)...

    Text Solution

    |

  6. An alternating e.m.f. given by e=200 sin 50 t is applied to a circuit ...

    Text Solution

    |

  7. An alternating voltage is represented by V=80 sin(100 pi t)cos(100 p...

    Text Solution

    |

  8. In an A.C. circuit, E=100 sin (500 t) volt and I=1000 sin(500 t +(pi)/...

    Text Solution

    |

  9. In an A.C. circuit, a resistance R=40 Omega and an inductance L are c...

    Text Solution

    |

  10. The inductance of a coil is 10 H. What is the ratio of its reactance w...

    Text Solution

    |

  11. For tuning radio and T.V. circuits, series resonance circuits are used...

    Text Solution

    |

  12. At what frequency 1 Henry inductance offers the same impedance as 1 mu...

    Text Solution

    |

  13. In a series resonant L-C-R circuit, the capacitance is changed from C ...

    Text Solution

    |

  14. A series L-C-R circuit with a resistance of 500 Omega is connected to ...

    Text Solution

    |

  15. At what rate the potential difference between the plates of a parallel...

    Text Solution

    |

  16. A parallel plate capacitor having plate area 0.5 m^(2) and plate separ...

    Text Solution

    |

  17. An a.c. generator consists of a coil of 1000 turns and area 2m^(2). Th...

    Text Solution

    |

  18. In Koyna hydroelectric power station, water stored at a height of 600 ...

    Text Solution

    |

  19. An inductor of inductance 2 mH is connected across a charged capacitor...

    Text Solution

    |

  20. The frequency of the output signal of an LC oscilliator circuit is 100...

    Text Solution

    |