Home
Class 12
PHYSICS
A square wire loop with sides 0.5 m is p...

A square wire loop with sides 0.5 m is placed with its plane perpendicular to the magnetic field. The resistance of the loop is `5Omega`. The rate at which the magnetic induction should be changed so that a current of 0.1 A is induced in the loop is

A

4 T/s

B

3 T/s

C

2 T/s

D

1 T/s

Text Solution

Verified by Experts

The correct Answer is:
C
`e=(dphi)/(dt)`
`IR=(AdB)/(dt)`
`(dB)/(dt)=(IR)/(A)=(0.1xx5)/(0.25)=2T//s`
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 certain elastic conducting material is stretched into a circular loop of 12.0 cm radius. It is placed with its plane perpendicular to a uniform 0.800 T magnetic field. When released, the radius of the loop starts to shrink at an instantaneous rate of 75.0 emfs. What emf is induced in the loop at that instant?

A circular wire loop of radius r lies in a uniform magnetic field B, with its plane perpendicular to magnetic field. If the loop is deformed to a square shape in the same plane in time t, the emf induced in the loop is

A square loop of side a carris a current I . The magnetic field at the centre of the loop is

A circular coil of radius 0.5 m and resistance 3.14 Omega is placed in a magneti induction with its plane perpendicular to the field. The rate of charnge of magnetic induction so as to produce a current of 50 mA in a coil is

A square loop of side 44 cm is changed to a circle in time 0.5 sec with its plane normal to a magnetic field 0.6 T. The emf induced is

A square loop of side 1 m is placed in a perpendicular magnetic field. Half of the area of the loop lies inside the magnetic field . A battery of emf 10 V and negligible intermal resistance is connected in the loop . The magnetic field changes with time according to the relation B= (0.01 -2t) tesla . The resultant emf of the circuit is

A plane loop shown in figure-5.71 is shaped in the from of two squares with sides a and b and it is introduced into a uniform magnetic field at right angles, to the loop's plane. The magnetic induction varies with time as B=B_(0) sin omega t. find the amplitude of the current induced in the loop if its resistance per unit length is equal to r. the induction of the loop is negligible.

A circular loop of area 0.02 m^2 carrying a current of 10A, is held with its plane perpendicular to a magnetic field induction 0.2T. The torque acting on the loop is

NIKITA PUBLICATION-ELECTROMAGNETIC INDUCTION-MCQs
  1. A coil of effective area 4m^(2) is placed with its plane perpendicular...

    Text Solution

    |

  2. A coil having an area of 0.4 m^(2) and 100 turns is kept perpendicular...

    Text Solution

    |

  3. A square wire loop with sides 0.5 m is placed with its plane perpendic...

    Text Solution

    |

  4. A meter gauge train runs northwards with a constant speed of 22 m/s on...

    Text Solution

    |

  5. The axle of a railway engine is of length 150 cm. the engine oves with...

    Text Solution

    |

  6. A vertical metal rod of length 1.5 m is at rest in the earth's magneti...

    Text Solution

    |

  7. A vertical metal rod 1 m long performs linear SHM at right angles to B...

    Text Solution

    |

  8. A vertical metal rod of length 1 m moves at right angles to its length...

    Text Solution

    |

  9. A metal rod of length 0.5 m rotates at a uniform angular speed about o...

    Text Solution

    |

  10. A coil of 500 turns and mean radius 10 cm makes 3000 rotations per min...

    Text Solution

    |

  11. A coil of 1000 turns each of area 1.2m^(2) is rotating about an axis i...

    Text Solution

    |

  12. An alternating emf, e=200 sin omegat is applied to a lamp, whose filam...

    Text Solution

    |

  13. When an alternating emf, e=300 sin 100pit volt is applied across a bul...

    Text Solution

    |

  14. An alternating emf of peak value 350 V is applied across an a.c. ammet...

    Text Solution

    |

  15. A circular coil of 50 turns an diameter 24 cm is rotated continuously ...

    Text Solution

    |

  16. The self inductance of a circuit ini which an emf of 10 V is induced w...

    Text Solution

    |

  17. The mutual inductance of a pair of a coil is 0.75 H. if the current in...

    Text Solution

    |

  18. The reactance of 2 H inductance in an ac circuit of frequency 50 Hz is

    Text Solution

    |

  19. The reactance of 1muF condenser in an ac circuit of frequency 50 Hz is...

    Text Solution

    |

  20. A coil has an inductance of 0.5 H is connected in series with a resist...

    Text Solution

    |