A Conductor of Radius R,length $\ell$ And Resistivity $\rho$ Has Resistance R $\frac { 1 } { 16 }$

question 53

Multiple Choice

A conductor of radius r,length $\ell$ and resistivity $\rho$ has resistance R.What is the new resistance if it is stretched to 4 times its original length?

• A) \(\frac { 1 } { 16 }\) R
• B) \(\frac { 1 } { 4 }\) R
• C)R
• D)4R
• E)16R

Evaluate the impact of environmental conditions (dry, damp, wet) on insulation performance.

Understand the relationship between temperature and resistance in materials, specifically the coefficient of temperature.

Learn the calculation and application of conductor ampacity in relation to surrounding air temperature and specified conditions.

Recognize the importance and method of using testing equipment (e.g., MEGGER) for assessing the integrity of wire insulation and identifying shorts or grounds.

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