key terms

• Capacitor

  A set of parallel metal plates that can store charge.
• Capacitance

  Charge stored on parallel plates.
• Conventional Current

  Current that flows from the positive terminal to the negative terminal.
• Current

  The amount of charge that goes past a point per second.
• Electromagnetic Induction

  The process of creating a current by changing a magnetic field.
• Faraday's Law

  If you change the magnetic flux, you will induce a voltage.
• Impedance

  The total opposition to current in an AC circuit.
• Internal Resistance

  The resistance within a battery.
• Kirchhoff's Current Law

  The current going into a junction must be the same as the current coming out of that junction.
• Kirchhoff's Voltage Law

  The sum of voltages around a closed loop must always be zero.
• Magnetic Flux

  The amount of a magnetic field that is passing through an area.
• Proportional

  Two or more values that change at the same rate as each other.
• Reactance

  Opposition of current caused by capacitance or inductance.
• Resonance

  The frequency of an AC circuit when impedance is minimum.
• RL Circuit

  A circuit with a resistor and an inductor.
• RMS

  'Root Mean Square'. A form of average used to find voltage and current in an AC circuit.
• Standard Form

  A number from 1 to 10, multiplied by 10 to the power of something.
• Time Constant

  The time taken for an exponential curve to change 63%.
• Transformer

  A tool that can increase or decrease the voltage of an AC current.
• Voltage

  The energy change in an electron