The Physics Blog

Magnetic Field of a Wire and a Solenoid

These pages are taken from the Hyperphysics Website which is the best online textbook for us to use.

The Magnetic field of a straight wire and the equation for solving problems associated with it is here

Download B Field of a wire Part 1

Download B Field of a wire Part 2

And the same for a solenoid is here

Download B Foeld for a Solenoid

The Current Balance for Measuring B

If you look at this set of instructions it has diagrams and an outline of the analysis that can be done in order to use F=BIl to find B, the magnetic field strength between the two magnets through which the current moves.

Download current balance instruction sheet

Solutions to the Gravity Questions

Here are the solutions to the Gravity Past Paper that you have been working through. I think that they are reasonable self explanatory, you need to have what is on them if you are going to get the marks. Be honest with yourself and do not interpret what you have written to be the same as what is on the mark scheme if it is not; the examiner won't!

Download past_papers_gravity_solutions.doc