Navigate

An air core coil and an electric bulb are connected in series with an AC source.

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

Options

(a) remain same
(b) increase
(c) decrease
(d) first decrease then increase

Correct Answer:

decrease

Explanation:

If an iron rod is puts in the coil, then intensity of light of bulb will decrease because the iron rod increase the resistance.

MP2013
admin:

Related Questions

  1. A boy standing at the top of a tower of 20m height drops a stone
  2. If voltage across a bulb rated 220 volt-100 Watt drops by 2.5% of its rated value
  3. The ratio of longest wavelength corresponding to Lyman and Blamer series
  4. A circular disc X of radius R is made from an iron plate of thickness t and another disc
  5. Photons of 5.5 eV energy fall on the surface of the metal emitting photoelectrons