Question

The resistance of a wire of length 100 cm and of uniform area of cross-section 0.020 cm², is found to be 2.0 ohm. Calculate the sp. resistance of the wire.

Answer 1

l = 100 cm; a = 0.020 cm²; R = 2.0 Ω

\[ \text{Sp. resistance, } \rho = \frac{Ra}{l}\]

\[ = \frac{2.0 \times 0.020}{100} \]

\[ = 0.0004 \ \Omega \text{cm}\]