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Theory
Atomic Structure & Magnetism
| Question | Answer |
|---|---|
| State the law of electrical charges | Like repel, unlike attract |
| Describe what kind of force keeps an electron in orbit around a nucleus | unlike charges of protons and electrons attract each other |
| What is alternating current | current that flows in 2 directions (bidirectional) |
| What electrical quantity is analogous to water pressure in a plumbing system? | voltage, EMF, potential difference |
| Volts? Ohms? Amps? Watts? | Voltage Resistance Current Power |
| Valence Electrons: Conductor? Insulator? Semiconductor? | C- 1 to 3 I- 7 to 8 S- 4 |
| What electrical quantity is the force that drives current through conductors? | Voltage, EMF, Potential difference |
| What is the difference between a closed circuit and a short circuit? | closed circuit is an intended path for current short circuit is an unintended path for current |
| When a coil wire is used to create an electromagnet, the coil of wire is wrapped around a core material. What does the term air core mean? | a core made of nonmagnetic material |
| what is residual magnetism? | magnetism that remains after magnetizing force and current is removed |
| Battery rule on electron flow | current flows from the negative terminal of a battery to the positive terminal |
| The south pole of one magnet is placed next to the north pole of another magnet. What do the two poles do? | attract each other |
| What is the ferromagnetic material | material that is easily magnetized |
| Name two factors that determine the strength of the magnetic field of an electromagnet | 1. amount of current 2. number of turns in coil (3). core |
| Draw Model | .. |
| What is it about certain materials that make those materials magnetic? | typically electrons form pairs whose spins are opposite, so tiny magnetic fields cancel each other out some electrons dont form pairs to cancel their opposing sides |
| explain how current flows through a conductor | the free electrons crashes into an atom. it transfers its energy to the valence electrons. a valence electron gets enough energy to leave its orbit and become a free electron. the repeated process is called current flow |
Created by:
jairoandres90
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