Parallel

Definition

Parallel circuits are electrical circuits where components are connected across common points or junctions, providing multiple paths for current to flow. In a parallel configuration, the voltage across each component is the same.

5 Must Know Facts For Your Next Test

1. In a parallel circuit, the total resistance is less than the smallest individual resistor in the circuit.
2. The formula for calculating total resistance in a parallel circuit is $\frac{1}{R_{total}} = \sum_{i=1}^{n} \frac{1}{R_i}$.
3. The voltage across each resistor in a parallel circuit is equal to the source voltage.
4. In a parallel circuit, the total current is equal to the sum of the currents through each path.
5. If one component in a parallel circuit fails, the other components can continue to operate.

Review Questions

• What happens to the total resistance when more resistors are added in parallel?
• How does the voltage across individual resistors in a parallel circuit compare to the source voltage?
• What is one major advantage of using parallel circuits over series circuits?

Related terms

Series Circuit:

An electrical circuit where components are connected end-to-end, providing only one path for current to flow.

Resistor:

A component used to resist the flow of electric current and control voltages within a circuit.

Ohm's Law:

$V = IR$, where $V$ is voltage, $I$ is current, and $R$ is resistance; it describes how voltage, current, and resistance are related.