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Question: Answered & Verified by Expert
A conductor and a semi-conductor are connected in parallel as shown in the figure. At a certain voltage both ammeters registers the same current. If the voltage of the DC source is increased then
PhysicsSemiconductorsVITEEEVITEEE 2007
Options:
  • A the ammeter connected to the semiconductor will register higher current than the ammeter connected to the conductor
  • B the ammeter connected to the conductor will register higher current than the ammeter connected to the semiconductor
  • C the ammeters connected to both semiconductor and conductor will register the same current
  • D the ammeter connected to both semiconductor and conductor will register no change in the current
Solution:
1767 Upvotes Verified Answer
The correct answer is: the ammeters connected to both semiconductor and conductor will register the same current
Since conductor and semiconductor are connected in parallel hence voltage across them is same. If ammeters show same reading hence their resistances $\mathrm{R}=\frac{\mathrm{V}}{\mathrm{I}}$ are same. If voltage is increased by small value then following the same relation $\mathrm{V} \propto \mathrm{I}$ for constant $R$, both conductor and semiconductor show same current.

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