Key Takeaways

KEY TAKEAWAYS

• The ampere is the unit for electric current.

• In drawing a circuit, the direction of the current is from the positive terminal to the negative terminal, even though this isn’t the flow of electrons in a typical electrical circuit.

• The flow of electricity depends on the potential difference between two terminals.

• AC current is alternating current, while DC current is direct current. AC current will increase and decrease with more ease than is the case with DC currents so this is why it’s used in homes and businesses.

• Resistors can be anything that takes away the current and results in an IR drop or voltage drop across it.

• Resistors in parallel operate differently than resistors in series.

• The EMF is the potential voltage across two terminals if no current is applied to it.