Home
Class 12
PHYSICS
The magnetic flux linked with a coil, in...

The magnetic flux linked with a coil, in webers is given by the equation `phi=3t^(2)+4t+9`. Then, the magnitude of induced emf at t = 2 s

A

2 V

B

4 V

C

8 V

D

16 V

Text Solution

Verified by Experts

The correct Answer is:
D
Magnitude of induced emf, `e=-(dphi)/(dt)`
`=-(d)/(dt)(3t^(2)+4t+9)=-(6t+4)`
`=-[6xx(2)+4]=-16`
`therefore" "|e|=16V`
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    DC PANDEY ENGLISH|Exercise Taking it together|119 Videos

  • ELECTROMAGNETIC INDUCTION

    DC PANDEY ENGLISH|Exercise Medical entrance special format questions|17 Videos

  • ELECTROMAGNETIC INDUCTION

    DC PANDEY ENGLISH|Exercise Example|71 Videos

  • CURRENT ELECTRICITY

    DC PANDEY ENGLISH|Exercise Medical entrances gallery|97 Videos

  • ELECTROMAGNETIC WAVES

    DC PANDEY ENGLISH|Exercise Sec C|22 Videos

Similar Questions

Explore conceptually related problems

The magnetic flux linked with a coil (in Wb) is given by the equation phi = 5t^2 + 3t +16 . The magnetic of induced emf in the coil at fourth second will be

The magnetic flux linked with a coil, in weber, is given by the equation: ϕ=5t^2+3t+16. The induced e.m.f. in the coil in the fourth second will be

The magnetic flux linked with a coil is phi and the emf induced in it is e .

The magnetic flux linked with a coil is given by an equation phi (in webers ) = 8t^(2)+3t+5 . The induced e.m.f. in the coil at the fourth second will be

Magnetic flux (in Wb) linked with a closed loop varies with time (in S) as Φ =2t^2+1. The magnitude of induced emf at t=1 s is

Magnetic flux (in Wb) linked with a closed loop varies with time (in S) as Φ =2t^2+1. The magnitude of induced emf at t=1 s is

The magnetic flux phi linked with a conducting coil depends on time as phi = 4t^(n) + 6 , where n is positive constant. The induced emf in the coil is e

Figure shows a conducting loop placed in a magnetic field. The flux through the loop changes due to change in magnetic field according to the equation phi=5t-10t^(2) . What is the direction and magnitude of induced current at t=0.25s ?

The magnetic flux (phi) linked with the coil depends on time t as phi=at^(n) , where a and n are constants. The emf induced in the coil is e

The flux linked with a coil at any instant 't' is given by phi = 10t^(2) - 50t +250 The induced emf at t = 3s is

DC PANDEY ENGLISH-ELECTROMAGNETIC INDUCTION-Check point
  1. The unit of magnetic flux is

    Text Solution

    |

  2. The dimensions of magnetic flux are

    Text Solution

    |

  3. The magnetic flux linked with a coil, in webers is given by the equati...

    Text Solution

    |

  4. A coil having an area A(0) is placed in a magnetic field which changes...

    Text Solution

    |

  5. The magnetic flux phi (in weber ) in a closed circuit of resistance 10...

    Text Solution

    |

  6. When the current through a solenoid increases at a constant rate, the ...

    Text Solution

    |

  7. The magnetic flux across a loop of resistance 10Omega is given by phi=...

    Text Solution

    |

  8. A circular ring of diameter 20cm has a resistance 0.01Omega How much c...

    Text Solution

    |

  9. Magnetic flux in a circuite containing a coil of resistance 2Omegachan...

    Text Solution

    |

  10. The direction of induced e.m.f. during electromagnetic induction is gi...

    Text Solution

    |

  11. Two different wire loops are concentric and lie in the same plane. The...

    Text Solution

    |

  12. Lenz's law is consequence of the law of conservation of

    Text Solution

    |

  13. The north pole of a long horizontal bar magnet is being brought closer...

    Text Solution

    |

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

    Text Solution

    |

  15. A conducing rod of length l is falling with a velocity v perpendicular...

    Text Solution

    |

  16. A wire of length 50 cm moves with a velocity of 300 m/min, perpendicul...

    Text Solution

    |

  17. A 10 m wire kept in east-west direction is falling with velocity 5 m/s...

    Text Solution

    |

  18. A boat is moving due east in a region where the earth's magnetic field...

    Text Solution

    |

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

    Text Solution

    |

  20. A conducing circular loop is placed in a uniform magnetic field of ind...

    Text Solution

    |