# Homework Help: 12 year old simple question. (seriously)

1. Feb 6, 2010

### seriuqs

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

Why does a superconductor have a greater magnetic field because of
a. its interior has no magnetic field
and b.it has no electrical resistance

2. Relevant equations

3. The attempt at a solution
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

2. Feb 6, 2010

### ideasrule

But a superconductor doesn't have a magnetic field. It actively tries to counteract any changes in the magnetic flux passing through it, leading to the Meissner effect.

3. Feb 6, 2010

### xcvxcvvc

By Ampere's law, is not the magnetic field produced by a conductor proportional to the current through it? Would not then a superconductor have a bigger magnetic field compared to a regular conductor due to the lack of electrical resistance?

4. Feb 6, 2010

### ideasrule

If you connect the superconductor to the same power source, yes, since you'll certainly short out the power source and make it deliver the maximum amount of current it can manage.