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

The magnetic flux linked with a coil varies as `phi=3t^(2)+4t+9.` Find the magnitude of the emf induced at t = 2S.

A

8 V

B

16 V

C

32 V

D

64 V

Text Solution

Verified by Experts

The correct Answer is:
B

`epsi=|(dphi)/(dt)|`
= 6t + 4
= 16 V
Promotional Banner

Topper's Solved these Questions

  • II PUC PHYSICS SUPPLEMENTARY EXAM QUESTION PAPER JULY - 2017

    SUNSTAR PUBLICATION|Exercise PART-D ( Vi. Answer any three of the following questions:)|5 Videos
  • K-CET-PHYSICS - 2016

    SUNSTAR PUBLICATION|Exercise MCQs|59 Videos

Similar Questions

Explore conceptually related problems

The magnetic flux linked with the coil varies with time as phi = 3 t^2 + 4t + 9 . The magnitude of induced emf at t = 2 second is

The magnetic flux (phi) linked with a coil is related to the number (n) of turns of the coil as :

The magnetic flux (phi) linked with a coil is related to the area (A) of the coil as :

The magnitude flux linked with a coil at any instant 't' is given by phi=5t^(3)-100t+300 , the e.m.f. induced in the coil at t=2 second is

A rectangular coil of 100 turns and size 0.1 m xx 0.05 m is placed perpendicular to a magnetic field of 0.1 T. If the field drops to 0.05 T in 0.05 second, the magnitude o the e.m.f. induced in the coil is

The normal magnetic flux passing through a coil changes with time according to the equation phi = 6t^2 - 5t + 1 . What is the magnitude of the induced current at t = 0.253 s and resistance 10 Omega ?

The magnetic flux phi (in weber) linked with a coil of resistance 10 Omega varies with time t (in second) as phi = 8t^2-4t+1 . The current induced in the coil at t = 0.1 sec is

Write the relation between the magnitude of electric and magnetic fields in an electromagnetic wave with speed of light and hence find the magnitude of the electric field at a point in space and time if the magnetic field at that place is 2 xx 10^(-8) T .

SUNSTAR PUBLICATION-K - CET - PHYSICS - 2018-MCQs
  1. The strength of the Earth's magnetic field is

    Text Solution

    |

  2. A jet plane having a wing - span of 25 m is travelling horizontally to...

    Text Solution

    |

  3. Which of the following represents the variation of inductive reactance...

    Text Solution

    |

  4. The magnetic flux linked with a coil varies as phi=3t^(2)+4t+9. Find t...

    Text Solution

    |

  5. A 100 W bulb is connected to an AC source of 220 V, 50 HZ . Then the c...

    Text Solution

    |

  6. In the series LCR circuit , the power dissipation is through

    Text Solution

    |

  7. In Karnatake , the normal domestic power supply AC is 220 V, 50 Hz . ...

    Text Solution

    |

  8. A step - up transformer operates on a 230 V line and a load current of...

    Text Solution

    |

  9. The number of photons falling per second on a completely darkened plat...

    Text Solution

    |

  10. An objected is placed at the principle focus of a convex mirror. The i...

    Text Solution

    |

  11. An object is placed at a distance of 20 cm from the pole of a concave ...

    Text Solution

    |

  12. A candle placed 25 cm from a lens forms an image on a screen placed 75...

    Text Solution

    |

  13. A plane wavefront of wavelength lamda is incident on a single slit of ...

    Text Solution

    |

  14. How will the diffraction pattern of single slit change when yellow lig...

    Text Solution

    |

  15. In Young's double slit experiment , two wavelengths lamda1 = 780 nm a...

    Text Solution

    |

  16. In Young.s double slit experiment, slits are separated by 2 mm and the...

    Text Solution

    |

  17. The maximum kinetic energy of emitted photoelectrons depends on

    Text Solution

    |

  18. A proton and an alpha particle are accelerated through the same potent...

    Text Solution

    |

  19. The total energy of an electron revolving in the second orbit of hydro...

    Text Solution

    |

  20. The period of revolution of an electron in the ground state of hydroge...

    Text Solution

    |