Home
Class 12
PHYSICS
A coil and a bulb are connected in serie...

A coil and a bulb are connected in series with a `dc` source, a soft iron core is then inserted in the coil. Then

A

Intensity of the bulb remains in the same

B

intensity of the bulb decreases

C

intensity of the bulb increases

D

the bulb ceases to glow

Text Solution

Verified by Experts

The correct Answer is:
B
There will be self-induction effect when soft iron core is inserted.
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    A2Z|Exercise AIIMS Questions|27 Videos

  • ELECTRIC POTENTIAL & CAPACITANCE

    A2Z|Exercise Section D - Chapter End Test|29 Videos

  • ELECTROMAGNETIC WAVES AND COMMUNICATION SYSTEM

    A2Z|Exercise Section D - Chapter End Test|30 Videos

Similar Questions

Explore conceptually related problems

A coil and a bulb are connected in series with a dc source, a soft iron core is then ninserted in the coil. Then

A coil and a bulb are connected in series with a 12 volt direct current source. A soft iron core is now inserted in the coil. Then

A bulb and an air-cored coil are connected in series with a 20 V DC source. Now a soft-iron core is inserted inside the coil. During the time interval when iron core is being inserted

An air core coil and an electric bulb are connected in series with an AC source. If an iron rod is put in the coil, then the intensity of light of the bulb will

An iron choke and an electric bulb are connected in series with AC mains. On introducing a soft iron bar in the coil, the intensity of bulb will

In an L-R circuit, if an iron core is inserted inside the coil

Assertion: A bulb connected in series with a solenoid is connected to AC source. If a soft iron core is introduced in the solenoid, the bulb will glow brighter. Reason: On introducing soft iron core in the solenoid, the inductance increases.

A bulb connected in series with a solenoid is lit by a.c. source, Fig. If the soft in core is introduced in the solenoid, will is bulb glow brighter ?

An electric bulb and a capacitor are connected in series with an AC source.On increasing the freqency of the source, the brightness of the bulb

A2Z-ELECTROMAGNETIC INDUCTION-Section D - Chapter End Test
  1. Two pure inductors each of self-inductance L are connected in parallel...

    Text Solution

    |

  2. A coil and a bulb are connected in series with a dc source, a soft iro...

    Text Solution

    |

  3. The current flowing in a coil of self-inductance 0.4 mH is increased b...

    Text Solution

    |

  4. 5 cm long solenoid having 10 ohm resistance and 5mH induced is joined ...

    Text Solution

    |

  5. A solenoid has an inductance of 60 henrys and a resistance of 30 ohms....

    Text Solution

    |

  6. In a circular conducting coil, when current increases from 2A to 18A i...

    Text Solution

    |

  7. Find out the e.m.f. produced when the current change from 0 to 1A in 1...

    Text Solution

    |

  8. A coil of 100 turns carries a current of 5mA and creates a magnetic fl...

    Text Solution

    |

  9. If the current 30A flowing in the primary coil is made zero in 0.1 sec...

    Text Solution

    |

  10. A square loop of side 5 cm enters a magnetic field with 1cms^(-1). The...

    Text Solution

    |

  11. A small coil is introduced between the poles of an electromagnet so th...

    Text Solution

    |

  12. Two circular coils A and B are facing each other as shown in figure. T...

    Text Solution

    |

  13. If in a coil rate of change of area is (5meter^(2))/(milli second)and ...

    Text Solution

    |

  14. Two coils P and Q are placed co-axially and carry current I and I' re...

    Text Solution

    |

  15. The phase difference between the flux linkage and the induced e.m.f. i...

    Text Solution

    |

  16. A hundred turns of insulated copper wire are wrapped around an iron cy...

    Text Solution

    |

  17. In circular coil, when no. of turns is doubled and resistance becomes ...

    Text Solution

    |

  18. In a transformer, number of turns in the primary coil are 140 and that...

    Text Solution

    |

  19. Two coil are placed close to each other. The mutual inductance of the ...

    Text Solution

    |

  20. When the current changes from +2A to -2A in 0.05 second, an e.m.f. of ...

    Text Solution

    |