# Homework Help: Two Simple Magnetism Questions

1. Jul 28, 2013

### Sunturday

1. The problem statement, all variables and given/known data

2. Relevant equations
F=ILB

3. The attempt at a solution
F1 - F2 = FT = 5*10^-5
Second one no clue.

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2. Jul 28, 2013

### Sunturday

And why is the current in this one clockwise as viewed from the top?

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3. Jul 28, 2013

### siddharth23

I think the answer to qn 4 is the current in the loop will flow in such a direction that the magnetic field produced by it will oppose the magnetic field of the magnet (law of conservation of energy). Hence, clockwise.

4. Jul 28, 2013

### siddharth23

For the first one, the current will flow in such a direction that the magnetic field produced by that current will oppose the motion of the loop to the right by applying a force to the left
F=ILB

5. Jul 28, 2013

### Sunturday

But inside the loop the magnetic field would be the other way.

6. Jul 28, 2013

### siddharth23

Yup. Basically it tries to stay in it's original state of rest and oppose change.