<p>A piece of wire of resistance R is cut into n equal parts. These parts are then connected in parallel. If the equivalent resistance of parallel combination is R&#39;, then&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mfenced><mfrac><mi>R</mi><mrow><mi>R</mi><mo>'</mo></mrow></mfrac></mfenced></math>&nbsp;is &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;</p>