Can someone please help me with number 4 and 5. I was able to work out number 3.

Question

Can someone please help me with number 4 and 5.   I was able to work out number 3. I used the F/L = Mu I1 I2/ 2pi r . My for munber three is F= 4Fo.

Now i just need number 4 and five. Explanations please.

Two wires carrying equal currents exert a forcc F0 on cach other. The current in cach wire is doubled, while the distance of separation remaining constant. What is the magnitude of the force that one wire exerts on the other? Refer to the configuration in step 3 of the experiment, if the electronic balance reading decreases as the current increases, is the magnetic force attractive or repulsive? When a magnetic field is parallel to a current-canying wire, what is the forcc on the wire?

Explanation / Answer

4.the force is attractive

5. the force is zero, since sin theta = 0

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