Circuits and Ohms Law 2nd

The symbol for a battery is two parallel lines, one longer than the other.

Ohm's Law states that the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R). It can be expressed as V = I × R.

The unit of current is Amperes (A).

The unit of resistance is Ohms (Ω).

The unit of voltage is Volts (V).

A closed circuit is a complete electrical circuit through which current can flow.

An open circuit is a broken circuit where current cannot flow.

In a series circuit, components are connected end-to-end, so the same current flows through all components.

In a parallel circuit, components are connected across the same voltage source, allowing current to flow through multiple paths.

Current (I) can be calculated using the formula I = V / R, where V is voltage and R is resistance.