Home
Class 12
PHYSICS
An e.m.f of 40 mV is induced in a soleno...

An e.m.f of 40 mV is induced in a solenoid, when the current in it changes at the rate of `2 A//s`. The self inductance of the solenoid is

A

5 mH

B

10 mH

C

20 mH

D

40 mH

Text Solution

Verified by Experts

The correct Answer is:
C
`e = L(dI)/(dt) :. 40 xx 10^(-3) = L xx 2`
`:. L = 20 xx 10^(-3) H = 20 mH`
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENTS

    MARVEL PUBLICATION|Exercise TEST YOUR GRASP - 16|30 Videos

  • ELASTICITY

    MARVEL PUBLICATION|Exercise Test Your Grasp - 5|15 Videos

  • ELECTRONS AND PHOTONS

    MARVEL PUBLICATION|Exercise TEST YOUR GRASP - 17|15 Videos

Similar Questions

Explore conceptually related problems

Self induction of a solenoid is

An emf of 30 mV is induced in a coil when current through it is changed at the rate of 6 A // s . What is the self-inductance of the coil?

An e.m.f. of 12"volts" is produced in a coil when the current in it changes at the rate of 45 amp//minute . The inductance of the coil is

An e.m.f. of 12 "volts" is induced in a given coil when the current in it changes at the rate of 48 amperes per minute. The self-inductance of the coil is

Self-inductance of a solenoid depend on-

An average induced e.m.f of 2V appers in a coil when the current in it is changed from 10 A in opposite direction in 0.5 sec. The self inductance of the coil is

The self-induced e.m.f in a 0.1H coil when the current in it is changing at the rate of 200 ampere//second is

A solenoid of length 40 cm area of cross section 20 cm^(2) abd total number of turns 800 is connected to a sources that supplies current changing at the rate of 0.2 A//s . What is the emf induced across the solenoid ?

MARVEL PUBLICATION-ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENTS -TEST YOUR GRASP - 16
  1. An e.m.f of 40 mV is induced in a solenoid, when the current in it cha...

    Text Solution

    |

  2. A coil having an area of 2m^(2) is placed in a magnetic field which ch...

    Text Solution

    |

  3. A straight conductor of length 2 is moves a velocity of 2 m//s, in a m...

    Text Solution

    |

  4. The magnetic flux passing perpendicular to the plane of a coil given b...

    Text Solution

    |

  5. Two identical circular loops of metal wire are lying on a table withou...

    Text Solution

    |

  6. A telegraph wire of length 2500m, is kept in E-W direction, at a heigh...

    Text Solution

    |

  7. When the current in a coil changes from 2A to 4A in 0.05 sec, the e.m....

    Text Solution

    |

  8. Two coil A and B are placed in a circuit. When current changes by 8 Am...

    Text Solution

    |

  9. Two coils P and S have a mutual inductance of 5 xx 10^(-3)H. If the cu...

    Text Solution

    |

  10. The primary and secondary voltage of an ideal step down transformer ar...

    Text Solution

    |

  11. A step down transformer has a turn ratio of 20 : 1. If 8 volt are deve...

    Text Solution

    |

  12. A step down transformer of efficiency 80% is used on a 1000V line to d...

    Text Solution

    |

  13. A coil 10 turns and area 10^(-2)m^(2) rotates in a magnetic field of 0...

    Text Solution

    |

  14. An alternating e.m.f. is given by E=10 cos omega t. If the frequency i...

    Text Solution

    |

  15. In an A.C. Circuit, the current is given by I=6 sin(200 pi t+(pi)/6)...

    Text Solution

    |

  16. An alternating e.m.f. given by e=200 sin 50 t is applied to a circuit ...

    Text Solution

    |

  17. An alternating voltage is represented by V=80 sin(100 pi t)cos(100 p...

    Text Solution

    |

  18. In an A.C. circuit, E=100 sin (500 t) volt and I=1000 sin(500 t +(pi)/...

    Text Solution

    |

  19. In an A.C. circuit, a resistance R=40 Omega and an inductance L are c...

    Text Solution

    |

  20. The inductance of a coil is 10 H. What is the ratio of its reactance w...

    Text Solution

    |

  21. For tuning radio and T.V. circuits, series resonance circuits are used...

    Text Solution

    |