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

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Definitions:

Bromecresol Purple

A pH indicator dye that changes color from yellow to purple over a pH range of approximately 5.2 to 6.8, commonly used in laboratory settings.

Buffers

Substances that help maintain the pH balance in a solution, resisting changes in pH when acids or bases are added.

Alkaline

Referring to a basic, as opposed to acidic, substance with a pH level greater than 7.

Hydroxide Ions

Negatively charged ions, OH-, produced when a hydroxide compound dissolves in water, basic in nature.