2015 · Q55
Two pieces of conductor of same material and of equal length are connected in series with a cell. One of the two pieces has cross-sectional area double that of the other. Which one of the following statements is correct in this regard?
General KnowledgePhysics
- AThe thicker one will allow stronger current to pass through it.
- BThe thinner one would allow stronger current to pass through it.
- CSame amount of electric current would pass through both the pieces producing more heat in the thicker one.
- DSame amount of electric current would pass through both the pieces producing more heat in the thinner one.
Explanation
In a series circuit the same electric current flows through both conductors. Heating equals I²Rt, and the thinner piece has the higher resistance, so it produces more heat. Option D is correct; options A and B wrongly suggest different currents in series.