Question

Wires A and B are identical except that each is made from a different material The one end of wire A is connected to one end of wire B The two remaining ends are connected across a battery and current flows through the two wires Which statement concerning this situation is true ?

• A. The potential difference across the two wires is the same but the current through each wire is different
• B. The potential difference across the two wires is the same and the current through each wire is same
• C. The potential difference across the two wires is the different but the current through each wire is same
• D. Both the potential difference across the two wires and current through each wire is different

Answer 1

The correct option is C The potential difference across the two wires is the different but the current through each wire is same

Answer is C.

Components connected in series are connected along a single path, so the same current flows through all of the components. The current through each of the components is the same, and the voltage across the circuit is the sum of the voltages across each component. In a series circuit, every device must function for the circuit to be complete.
In this case, Wires A and B are identical except that each is made from a different material, that is, they have different resistitvity and therefore different resistances. They are connected in series.
In a series circuit, the current remains the same through all the components whereas the voltage differs.
Hence, The potential difference across the two wires is the different but the current through each wire is same.