EPP test

Overview of Electromotive Force and Voltage

Electromotive Force (EMF)

• Maximum voltage from a power source, typically a battery or power supply.

• For instance, a bed may provide a voltage of 24 volts.

Potential Difference (Voltage)

• Also known as voltage drop, measured across two circuit terminals.

• Depends on current flow and circuit resistance.

Understanding Resistors in a Circuit

• Resistors influence current and voltage in a circuit, limiting current flow and affecting potential difference.

Types of Electric Flow

• Conventional Current Flow: Current flows from positive to negative terminal.

• Conductivity in Circuits:

  • Conductors (e.g., copper, aluminum) allow current flow.

  • Non-conductive materials (like carbon) do not allow current.