Home
Class 12
PHYSICS
A coil of copper having 1000 turns is pl...

A coil of copper having `1000` turns is placed in a magnetic field `B=4xx10^(-3)T` perpendicular to its plane. The cross-sectional area of the coil is `0.05m^(2)`. If it turns through `180^(@)` in `0.01s`, then the e.m.f induced in the coil is

A

0.2V

B

0.3V

C

0.1V

D

0.4V

Text Solution

Verified by Experts

The correct Answer is:
D
`e=(dphi)/(dt)=(2nAB)/(dt)=0.4V`
Promotional Banner

Topper's Solved these Questions

  • ELASTICITY

    NIKITA PUBLICATION|Exercise MCQ|314 Videos

  • ELECTRONS AND PHOTONS

    NIKITA PUBLICATION|Exercise MCQs|162 Videos

Similar Questions

Explore conceptually related problems

A coil has 2000 turns and area of 70cm^(2) . The magnetic field perpendicular to the plane of the coil is 0.3 Wb//m^(2) and takes 0.1 sec to rotate through 180^(0) . The value of the induced e.m.f. will be

A rectangular copper coil is placed in a uniform magnetic field of induction 40 mT with its plane perpendicular to the field. The area of the coil is shrinking at a constant rate of 0.5m^(2)s^(-1) . The emf induced in the coil is

If number of turns of 70 cm^(2) coil is 200 and it is placed in a magnetic field of 0.8 Wb//m^(2) which is perpendicular to the plane of coil and it is rotated through an angle 180^(@) in 0.1 sec , then induced emf in coil :

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

Area of a coil is 0.16m^2 . If the magnetic field through it changes from 0.1 Wb//m^2 to 0.5 Wb//m^2 in 0.02s, then the emf induced in the coil will be-

A rectangular coil is placed in a region having a uniform magnetic field B perpendicular to the plane of the coil. An emf will not be induced ion the coil if the

A coil of 100 turns is pulled from the magnetic field where its area includes 21 xx 10^(-4) Wb to a place where its area includes 1 xx 10^(-4) Wb. If the time for pulling is 0.05 s, find the emf induced in the coil.

A coil of 1000 turns is wound on a book and this book is lying on the table. The vertical component of the earth's magnetic field is 0.6xx10^(-4) T and the area of the coil is 0.05 m^(2) . The book is turned over once about a horizontal axis is 0.1 s. this average emf induced in the coil is

A coil has an area of 0.05 m^(2) and it has 800 turns. It is placed perpendicular in a magnitude field of strength 4xx10^(-5)Wb//m^(2) , it is rotated through 90^(@) in 0.1 sec. the average e.m.f. induced in the coil is

The coil of area 0.1 m^(2) has 500 turns. After placing the coil in a magnetic field of strength 4 xx 10^(-4) Wb//m^(2) , if rotated through 90^(@) in 0.1 s, the average emf induced in the coil is

NIKITA PUBLICATION-ELECTROMAGNETIC INDUCTION-MCQs
  1. The length l of a wire is shaped to form a coil of 1 turn. This coil h...

    Text Solution

    |

  2. Two coils have the mutual inductance of 0.05 H. The current changes in...

    Text Solution

    |

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

    Text Solution

    |

  4. A coil of 40 Omega resistance has 100 turns and radius 6 mm us connect...

    Text Solution

    |

  5. The mutual inductance between a primary and secondary circuit is 0.5H....

    Text Solution

    |

  6. In an AC circuit, V and I are given by V=100sin(100t)volts, I=100sin(1...

    Text Solution

    |

  7. A pure resistive circuit element X when connected to an ac supply of p...

    Text Solution

    |

  8. In L-R circit, the A.C. source has voltage 220V. If potential differen...

    Text Solution

    |

  9. An AC source is 120 V-60 Hz. The value of voltage after 1/720 s from...

    Text Solution

    |

  10. A coil having an inductance of 1//pi henry is connected in series with...

    Text Solution

    |

  11. A resistor an inductor and a capacitor are connected in series to an a...

    Text Solution

    |

  12. An inductive circuit a resistance of 10ohm and an inductance of 2.0 h...

    Text Solution

    |

  13. When 100 V DC is applied across a solenoid, a current of 1.0 A flows i...

    Text Solution

    |

  14. In an LCR series circuit the capacitance is changed from C to 4C For t...

    Text Solution

    |

  15. The reactance of an inductor at 50 Hz is 100Omega. If the frequency is...

    Text Solution

    |

  16. An e.m.f. E=4cos(1000t)volt is applied to an LR circuit of inductance ...

    Text Solution

    |

  17. The magnetic flux associated with a coil changes from zero to 5xx10^(-...

    Text Solution

    |

  18. A coil having 50 turns and an area of 800 cm^(2) is held with its plan...

    Text Solution

    |

  19. The horizontal telegraph wire 100 m long, oriented along magnetic east...

    Text Solution

    |

  20. A coil of effective area 4m^(2) is placed with its plane perpendicular...

    Text Solution

    |