13.4: A rectangular bar of iron is 2.0 cm by 2.0 cm in cross section and 40 cm Long. Calculate its resistance.

Problem No 13.4 <br />A rectangular bar of iron is 2.0 cm by 2.0 cm in cross section and 40 cm Long. Calculate its resistance. <br />Numerical Problem <br />Chapter No 13 <br />Current Electricity <br />Physics <br />Part 2