Home
Class 12
PHYSICS
Assertion Coefficient of self-induction ...

Assertion Coefficient of self-induction of an inductor depends upon the rate of change of current passing through it.
Reason From, `e=-L(di)/(dt)`
We can see that, `L=(-e)/((di//dt))or L prop (1)/((di//dt))`

A

If both Assertion and Reason are corrent and Reason is the corrent explanation of Assertion.

B

If both Assertion and Reason are correct but Reason is not the correct explanation of Assertion.

C

If Assertion is true but Reason is false.

D

If Assertion is false but Reason is ture.

Text Solution

Verified by Experts

The correct Answer is:
D
Self-inductance does not depend upon current flowing or change in current flowing but it depends upon turns N. Area of cross-section (A) and permeabillity of medius `(mu)`.
We have, `=(di)/(dt)`.
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    DC PANDEY|Exercise Match the columns|5 Videos

  • ELECTROMAGNETIC INDUCTION

    DC PANDEY|Exercise Medical entrances gallery|25 Videos

  • ELECTROMAGNETIC INDUCTION

    DC PANDEY|Exercise Taking it together|119 Videos

  • CURRENT ELECTRICITY

    DC PANDEY|Exercise Medical entrances gallery|97 Videos

  • ELECTROMAGNETIC WAVES

    DC PANDEY|Exercise Sec C|22 Videos

Similar Questions

Explore conceptually related problems

Assertion : There can be induced e.m.f. in an inductor even if the current through it is zero. Reason : Induced e.m.f. depends upon the rate of change of current rather than the current itself.

The coefficients of self induction of two coils are L_(1) and L_(2) .To induce an of 2 volt in the coil, a change of current of 1A has to be produced in 5 second and 50ms respectively. The ratio of their self inductances L_(1):L_(2) will be

Self induction is the property of a coil by virture of which the coil oppose any change in the strenght of current flowing through it by inducting an e.m.f. in itself. Self induction represents electric inertia which is measured in terms of coefficient of self inductance We can show that L = (phi)/(I) = (-e)/(dI//dt) Read the above passage and answer the following questions : An e.m.f. of 150 microvolt is induced in a coil when current in it changes from 5A ot 1 A in 0.2 sec. what is self inductance of the coil ? (ii) How does self indcution of a coil represent its electric inertia ? (iii) What is them implication of this property in our daily life ?

In an inductor of self-inductance L=2 mH, current changes with time according to relation i=t^(2)e^(-t) . At what time emf is zero ?

Assertion : Angular frequency of LC oscillations is 2 rad//s and maximum current in the circuit is 1 A . Then, maximum rate of change of current should be 2 A//s . Reason: ((dI)/(dt))_(max)=(I_(max))omega

Assertion : When number of turns in a coil is doubled, coefficient of self-inductance of the coil becomes 4 times. Reason : This is because L prop N^(2)

The current through two inductors of self inductance 12 mH and 30 mH is increasing with time at the same rate. Draw graphs showing the variation of the (a ) e.m.f. induced with the rate of change of current in each inductor. (b) enargy stored in each inductor with the current flowing through it. Compare the energy stored in the coils if power dissipated in the coil is same.

DC PANDEY-ELECTROMAGNETIC INDUCTION-Medical entrance special format questions
  1. Assertion Magnetic flux and the electric flux have the same units. R...

    Text Solution

    |

  2. Assertion : In the phenomenon of mutual induction, self induction of...

    Text Solution

    |

  3. Assertion When two magnets are brought closer to each other, then they...

    Text Solution

    |

  4. Assertion Mutual inductance of two coils depends on the distance betwe...

    Text Solution

    |

  5. Assertion Coefficient of self-induction of an inductor depends upon th...

    Text Solution

    |

  6. Assertion If a magnet is brought closer to a current carrying loop alo...

    Text Solution

    |

  7. Assertion In the figure, just after closing the switch the potential d...

    Text Solution

    |

  8. Assertion If current shown in the figure is increasing, then Reas...

    Text Solution

    |

  9. Assertion If two inductors are in paralled, then current in distribute...

    Text Solution

    |

  10. Assertion An induced emf of 2 V is developed in a circular loop, if cu...

    Text Solution

    |

  11. Assertion If a straight wire is moved in a magnetic field, no emf will...

    Text Solution

    |

  12. Assertion If a loop is placed in a non-uniform (with respect to posit...

    Text Solution

    |

  13. Assertion If current passing through a circular loop is doubled, then ...

    Text Solution

    |

  14. Assertion Two concentric conducting rings of different radii are place...

    Text Solution

    |

  15. Statement-1 : The induced e.m.f. and current will be same in two ident...

    Text Solution

    |

  16. Assertion A conducting loop is rotated in a uniform magnetic field wit...

    Text Solution

    |

  17. Assertion A magnetic is dropped along the axis of a circular conductin...

    Text Solution

    |