(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Suppose we have 2 insulated metal rods each measuring 40 cm. Now,the 2 metal rods are connected with 3 identical springs each of length 20 cm (force constant 2.0 N/m) in parallel. A current of 20A is passed through each metal rod in opposing directions. What is the extension of each spring? The springs are initially not stretched.

2. Relevant equations

F=BIL

B= {[tex]\mu[/tex] x I}/{2[tex]\pi[/tex]r}

3. The attempt at a solution

I calculated the force acting on each metal rod to be 0.0036 N. The 2 metal rods repel each other since the current flowing through them is in opposite directions.

Now, my question is what is the resultant force acting on each spring? Is it 0.0012N or 0.0012 x 2 = 0.0024 N since there are 2 forces acting on each spring ; pulling each spring from the 2 ends ?

Thanks for your help!

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# Homework Help: Resultant Force Acting On Springs : Confused

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