Electronics

Question 1

Electric field

Answer 1

Vector field defined as the electric force per unit charge (E=f/q)

Question 2

Voltage

Answer 2

“Electromotive force” - measure of the electric potential energy per unit charge

Question 3

Current

Answer 3

Movement or flow of charge

Question 4

Resistance

Answer 4

Opposition to direct (or unidirectional) current flow

Question 5

Capacitance

Answer 5

Ability to store charge

Question 6

Time constant

Answer 6

1 time constant represents the time that it takes to charge the capacitor by ~63%; takes about 5 time constants to fully charge capacitor

Question 7

Impedance

Answer 7

Opposition to alternating (AC) current flow

Question 8

1st Principle of Inductance

Answer 8

Current in a wire has an associated magnetic field that runs PERPENDICULAR to the current according to the right hand rule

Question 9

2nd Principle of Inductance

Answer 9

A CHARGING magnetic field induces current in a wire - static fields don’t do this. It must be perpendicular