Home
Class 12
PHYSICS
A solenoid carrying a current supplied b...

A solenoid carrying a current supplied by a `DC` source with a constant emf contains an iron core inside it. How will the current change when the core is pulled out of the solenoid: will it increase, decrease, or remain the same?

A

remain same

B

decreases

C

inrease

D

modulate

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    TARGET PUBLICATION|Exercise EVALUATION TEST|8 Videos

  • ELECTROMAGNETIC INDUCTION

    TARGET PUBLICATION|Exercise CRITICAL THINKING|84 Videos

  • ELASTICITY

    TARGET PUBLICATION|Exercise Evaluation test|14 Videos

  • ELECTROSTATICS

    TARGET PUBLICATION|Exercise EVALUATION TEST|14 Videos

Similar Questions

Explore conceptually related problems

What is the effect of inserting a soft iron core inside a current-carrying solenoid?

State qualitatively the effect of inserting an iron core into a current-carrying solenoid.

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 solenoid with an iron core and a bulb are connected to a d.c. source. How does the brightness of the bulb change when iron core is removed from the solenoid ?

A solenoid having an iron core has its terminals connected across an ideal DC source and it is in steady state.If the iron core is removed the current flowing through the solenoid just after removal of rod

A solenoid is connected to a battery so that a steady current flows through it. If an iron core is inserted into the solenoid, then

TARGET PUBLICATION-ELECTROMAGNETIC INDUCTION-COMPETITIVE THINKING
  1. Lenz's law is consequence of the law of conservation of

    Text Solution

    |

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

    Text Solution

    |

  3. A solenoid carrying a current supplied by a DC source with a constant ...

    Text Solution

    |

  4. A square coil of 10^(-2) m^(2) area is placed perpenducular to a unifo...

    Text Solution

    |

  5. Magnetic flux phi (in weber) linked with a closed circuit of resistanc...

    Text Solution

    |

  6. The magnetic flux linked with coil, in weber is given by the equation,...

    Text Solution

    |

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

    Text Solution

    |

  8. A coil of resistance 400Omega is placed in a magnetic field. If the ma...

    Text Solution

    |

  9. A coil having effective area A, is held with its plane normal to a mag...

    Text Solution

    |

  10. Magnetic flux passing through a coil is initially 4xx 10^-4 Wb. It re...

    Text Solution

    |

  11. A coil having 200 turns has a surface area of 0.15m^(2). A magnetic fi...

    Text Solution

    |

  12. For a coil of unit area, induction is doubled in 0.2s. Then, the induc...

    Text Solution

    |

  13. A coil having 'n' turns and resistance R Omgea is connected with a gal...

    Text Solution

    |

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

    Text Solution

    |

  15. If rotational velocity of a dynamo armature is doubled, then induced e...

    Text Solution

    |

  16. A straight conductor 0.1 m long moves in a uniform magnetic field 0.1 ...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  19. Consider a metal ball of radius 'r' moving at a constant velocity 'v' ...

    Text Solution

    |

  20. An aircraft with a wingspan of 40 m flies a speed of 1080 km hr(1) in ...

    Text Solution

    |