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Theory

Atomic Structure & Magnetism

QuestionAnswer
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