A wire of resistance R and radius r is stretched till
its radius became r/2. If new resistance of the
stretched wire is x R, then value of x is _________. 

                                                                         JEE-2024

Solution:                
A wire of resistance R and radius r is stretched till its radius became r/2. If new resistance of the stretched wire is x R, then value of x is _________. JEE-2024

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