A Wire of Length L,cross Sectional Area a and Resistance $\times$

question 90

Multiple Choice

A wire of length L,cross sectional area A and resistance R is now drawn out by pulling such that its new resistance is 25R.What is its new cross sectional area? (Assume the density remains constant.)

• A)1.00 \(\times\) 10^-1 A
• B)6.67 \(\times\) 10^-1 A
• C)4.00 \(\times\) 10^-1 A
• D)2.50 \(\times\) 10^-1 A
• E)2.00 \(\times\) 10^-1 A

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