Recent content by MartinCarr

As we know a current carrying wire will induce a magnetic field around it. This field will be clockwise around the wire in the direction of current. Both wire Y and Z will exert a force on X. By looking at the direction of the magnetic field from Y and then Z at the side of X (either into or...

Did you work this out or do you need me to explain more?

See the attached file on the above post..

All about working out the force from each wire on X, the you know which way the current should be..

This is the same idea as when you start to walk, you have created momentum! In reality the Earth moves the opposite direction, but due to mass. Hartly at at all!

I have not tried it with a different zero PE at the centre, but outcome should be the same..

I think the mass should be the other way around, but them I may have missed something.. The question is what the rocket velocity will be after 500Kg of fuel has been used,not what the exhaust gas will be (which I would assume zero).

Well something like this?

In your house you can only change the current. Think of it a different way, something with a high resistance reduces current flow, but gets hot in the process

Yes, but looking at those two equations what can you change at home? Voltage or current? In practice all you can change is the current flow