Home
Class 12
PHYSICS
In an A.C. generator, when the plane of ...

In an A.C. generator, when the plane of the armature is perpendicular to the magnetic field

A

both magnetic flux and e.m.f. are maximum

B

both magnetic flux and e.m.f. are zero

C

both magnetic flux and e.m.f. are half of their respective maximum values

D

magnetic flux is maximum and e.m.f is zero

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    TARGET PUBLICATION|Exercise COMPETITIVE THINKING|158 Videos
  • ELECTROMAGNETIC INDUCTION

    TARGET PUBLICATION|Exercise EVALUATION TEST|8 Videos
  • ELECTROMAGNETIC INDUCTION

    TARGET PUBLICATION|Exercise EVALUATION TEST|8 Videos
  • ELASTICITY

    TARGET PUBLICATION|Exercise Evaluation test|14 Videos
  • ELECTROSTATICS

    TARGET PUBLICATION|Exercise EVALUATION TEST|14 Videos

Similar Questions

Explore conceptually related problems

A ring is rotated about diametric axis in a uniform magnetic field perpendicular to the plane of the ring. If initially the plane of the ring is perpendicular to the magnetic field. Find the instant of time at which EMF will be maximum & minimum respectively. (Figure: )

When a charged particle moves perpendicular to a magnetic field, then:

A circular coil of 100 turns and having an effective radius of 5cm carries a current of 0*1 ampere. How much work is required to turn it in an external magnetic field of 1*5 weber//m^2 through 180^@ about an axis perpendicular to magnetic field. The plane of the coil is initially perpendicular to the magnetic field.

A circular coil of 100 turns has an effective radius of 0.05 m and carries a current of 0.1 A. How much work is required to turn it in an external magnetic field of 1.5 Wb m^-2 through 180^@ about an axis perpendicular to the magnetic field. The plane of the coil is initially perpendicular to the magnetic field.

Assertion A conducting loop is rotated in a uniform magnetic field with constant angular velocity omega as shown in figure. At time t = 0, plane of the loop is perpendicular to the magnetic field. Induced emf produced in the loop is maximum when plane of loop is parallel to magnetic field. Reason When plane of loop is parallel to magnetic field, then magnetic flux passing through the loop is zero.

Velocity is Perpendicular to Magnetic Field |Questions

Assertion : We use a thick wire in the secondary of a step down transformer to reduce the production heat . Reason : When the plane of the armature is parallel to the lines of force of magnetic field , the magnitude of induced e.m.f. is maximum .

What is the potential energy of a magnetic dipole when it is placed perpendicular to the magnetic field?

TARGET PUBLICATION-ELECTROMAGNETIC INDUCTION-CRITICAL THINKING
  1. The ratio of secondary to the primary turns in a transformer is 3:2. I...

    Text Solution

    |

  2. The number of turns in the primary coil of a transformer is 1000A. A p...

    Text Solution

    |

  3. In an A.C. generator, when the plane of the armature is perpendicular ...

    Text Solution

    |

  4. A coil of effective area 2m^(2) is rotated so as to cut a magnetic fie...

    Text Solution

    |

  5. A coil of copper having 1000 turns is placed in a magnetic field B=4xx...

    Text Solution

    |

  6. A coil of area 80cm^(2) and number of turns 50 is rotating about an ax...

    Text Solution

    |

  7. The peak value of induced e.m.f. in a coil of 5000 turns each and of a...

    Text Solution

    |

  8. The number of turns in the coil of an ac genrator is 5000 and the area...

    Text Solution

    |

  9. In a region of a uniform magnetic induction B=10^(-3)T, a circular coi...

    Text Solution

    |

  10. The general equation for the instantenous e.m.f. of a generator (frequ...

    Text Solution

    |

  11. The instantaneous current in a circuit is, I=sin(omegat+phi) ampere. W...

    Text Solution

    |

  12. An alternating voltage of e=100sqrt(2)sin(100t) volt is connected to a...

    Text Solution

    |

  13. A hot wire ammeter reads 10A in A.C. circuit. The peak value of the cu...

    Text Solution

    |

  14. A 40Omega electric heater is connected to a 200V, 50Hz main supply. Th...

    Text Solution

    |

  15. A 20volts AC is applied to a circuit consisting of a resistance and a...

    Text Solution

    |

  16. Instantaneous values of current and e.m.f in an AC circuit are I=I//s...

    Text Solution

    |

  17. The rms value of an ac of 50Hz is 10A. The time taken by an alternatin...

    Text Solution

    |

  18. The r.m.s value of induced voltage in a coil of 50 turns each of area ...

    Text Solution

    |

  19. An alternating e.m.f. of 100V (rms) is applied to a series LCR circuit...

    Text Solution

    |

  20. A 10muF capacitor is connected across a 200V, 50Hz A.C. supply. The pe...

    Text Solution

    |