# Electromagnetic Induction

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1. Apr 8, 2016

### Rmehtany

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

2. Relevant equations
Not really? I just used the right hand rule and Lenz's law

3. The attempt at a solution

By the right hand rule, outside of loop 1, the magnetic field is out of the page. However, increasing resistance means that field is weakening. We know by Lenz's law that loop 2 will try to replace that field, so outside of loop two should be an out of the page magnetic field. This means the current direction is Clockwise, giving choice B

However, the answer is choice A. Why?

2. Apr 9, 2016

### cnh1995

Magnetic flux from the left loop will be linked with the right loop. What is the direction of field in the right loop because of the current flowing through the left loop? Since the current in the left loop is decreasing, to maintain the previous direction(and magnitude) of the field, current will flow through the right loop.

3. Apr 10, 2016

### Rmehtany

Wouldn't the field be out of the page because outside of the left ring, the field is out of the page?

4. Apr 10, 2016

### cnh1995

Yes. But if that field is collapsing, in what direction should the current flow in order to resist this "change"?