Home
Class 12
PHYSICS
A rod of 10 cm length is moving perpendi...

A rod of 10 cm length is moving perpendicular to uniform magnetic field of intensity `5 xx 10^(-4) "Wb/m"^2`. If the acceleration of the rod is `5 "m/s"^2`, then the rate of increase of induced emf is ….

A

`2.5xx10^(-4) Vs^(-1)`

B

`25xx10^(-4)` Vs

C

`20xx10^(-4)` Vs

D

`20xx10^(-4) "Vs"^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
A
`|epsilon|`=Bvl
`therefore (d|epsilon|)/(dt)=B(dv)/(dt)l`
=Bal
`=5xx10^(-4)xx5xx0.1`
`=2.5xx10^(-4) "Vs"^(-1)`
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    KUMAR PRAKASHAN|Exercise Section D MCQs (From DARPAN Based on Textbook )|121 Videos

  • ELECTRIC CHARGES AND FIELDS

    KUMAR PRAKASHAN|Exercise SECTION D MCQS ASKED IN COMPETITIVE EXAMES (MCQS AKSED IN BOARD EXAM AND GUJCET)|14 Videos

  • ELECTROMAGNETIC WAVES

    KUMAR PRAKASHAN|Exercise BOARD.S QUESTION PAPER MARCH - 2020 (PART - B) SECTION - C|5 Videos

Similar Questions

Explore conceptually related problems

A rod of 5 cm length is moving perpendicular to uniform magnetic field of intensity 2 xx 10^(-4) "Wbm"^(-2) . If the acceleration of rod is 2 ms^(-2) , the rate of increasing of the induced emf is .......

A rod of 5m length is moving perpendicular to uniform magnetic field of intensity 2 xx 10^(-4) "Wb/m"^2 . If the acceleration of rod is 2ms^(-2) , th rate of increase of the induced emf is____

A proton is moving perpendicular to a uniform magnetic field of 2.5 tesla with 2MeV kinetic energy. The force on the proton is ______ .

A coil of surface area 200 cm^2 having 25 turns is held perpendicular to the magnetic field of intensity 0.02 "Wb/m"^2 . The resistance of the coil is 1 Omega if it is removed from the magnetic field in 1s, the induced charge in the coil is ….. C.

A coil of surface area 100 cm^2 having 50 turns is held perpendicular to the magnetic field of intensity 0.02 "Wb m"^(-2) . The resistance of the coil is 2 Omega . If it is removed from the magnetic field in 1s, the induced charge in the coil is ____

An electrons enters perpendicularly into uniform magnetic field having magnitude 0.5xx10^(-4)T .If it moves on a circular path of radius 2mm,its de-Broglie wavelength is…..A

A straight line conductor of length 0.4 m is moved with a speed of 7 m/s perpendicular to a magnetic field of intensity 0.9 Wb/ m^2 . The induced emf across the conductor is ____

Acceleration of a car in motion is 1.5 m s^(-2). How much is the increase in velocity in 4s?

KUMAR PRAKASHAN-ELECTROMAGNETIC INDUCTION-Section D MCQs (MCQs asked in Competitive Exams )
  1. Inside a parallel plate capacitor the electric field E varies with tim...

    Text Solution

    |

  2. The magnetic potential energy stored in a certain inductor is 25 mJ, w...

    Text Solution

    |

  3. A 800 turn coil of effective area 0.05 m^2 is kept perpendicular to a ...

    Text Solution

    |

  4. In which of the following devices, the eddy current effect is not used...

    Text Solution

    |

  5. A conducting ring of radius r is placed perpendicular inside a time va...

    Text Solution

    |

  6. A conducting coil having 500 turns has cross sectional area 0.15 m^2. ...

    Text Solution

    |

  7. The network shown in figure is a part of the circuit. (The battery has...

    Text Solution

    |

  8. A rod of 10 cm length is moving perpendicular to uniform magnetic fiel...

    Text Solution

    |

  9. Select incorrect unit of self inductance

    Text Solution

    |

  10. The number of turns in the coil of an A.C. generator are 100 and its c...

    Text Solution

    |

  11. If R and L denote resistance and inductance respectively which of the ...

    Text Solution

    |

  12. Two inductors each of inductance L are connected in parallel. One more...

    Text Solution

    |

  13. A coil having 200 turns has a surface of 0.15 m^2. A magnetic field of...

    Text Solution

    |

  14. A wheel of radius 2m having 8 conducting concentric spokes is rotating...

    Text Solution

    |

  15. A coil of surface area 200 cm^2 having 25 turns is held perpendicular ...

    Text Solution

    |

  16. A wheel of radius 2m having 8 conducting concentric spokes is rotating...

    Text Solution

    |

  17. A coil of surface area 200 cm^2 having 25 turns is held perpendicular ...

    Text Solution

    |

  18. Dimensional formula of mutual inductance is …….

    Text Solution

    |

  19. The magnitude of the induced emf is equal to the time rate of change o...

    Text Solution

    |

  20. Which one of the following is an equation of magnetic energy density ?

    Text Solution

    |