Question

Asked Aug 1, 2019

Wire *C* and wire *D* are made from different materials and have length *L _{C}* =

Step 1

The electric potential difference between point 1 and 2 is the potential drop in wire C.

Write the expression for resistance of a circular wire C

Here, *R*_{C} is the resistance of the wire C, *ρ*_{C} is its resistivity, *L*_{C} is its length and *d*_{C} is its diameter.

Substitute 3.3×10^{-6} Ω·m for *ρ*_{C}, 3.1 m for *L*_{C} and 1.03 mm for *d*_{C}

Step 2

Write the expression for potential drop in wire C

Here, *V*_{C} is the potential drop in wire C and *i*_{C} is the current flowing through it.

Step 3

Substitute 12.27 Ω for *R*C and 2.6 A for *i*C in equation (I) to find *V*C

Thus, the electric poten...

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