Chapter 9 Magnets and currents

Properties of magnets?

2 of the same pole will?
2 opposite poles will?

How can you make a magnet?

How do you demagnetize something?

Properties of soft iron?

How can field lines be shown?

How can field lines be shown around a magnet?

What is the rule for field direction?

How can you make a magnetic field stronger?

What is a long coil of wire called?

How could you change the poles?

What is an electromagnet and how is is different form a normal magnet?

What is a magnetic relay?

How does a magnetic relay work?

What is Fleming's left-hand rule?

How does a simple dc motor work?

How can the turning effect on the coil be increased?

How do you induce a current in a coil?

How can the induced voltage be increased?

What is a transformer?

How does a transformer work?

What is the turns ratio

What is a step up transformer?

What is a step down transformer?

What is the equation for power through a transformer?