Resistors in Electric Circuits (6 of 16) Adding Resistors to Parallel Circuits, Part 1

TL;DR

Adding resistors in parallel increases total current, decreases total resistance, voltage drop across bulbs stays the same, current through bulbs remains constant, and brightness of bulbs is unchanged.

Transcript

okay that's right you guessed it in today's video we are gonna be talking about adding resistors in parallel and this is the circuit that we're going to use we want to know and this is what we're talking about in the video we want to know when we close this switch when the switch is closed will the following things increase decrease or stay the sam... Read More

Key Insights

• 🪜 Total current increases when resistors are added in parallel due to the additional current path.
• 🥺 The total equivalent resistance decreases in parallel circuits as more current leads to lower overall resistance.
• ⚡ Voltage drop across bulbs remains constant in parallel circuits as each bulb is directly connected to a voltage source.
• 💦 Current through individual bulbs stays the same in parallel circuits, as the voltage drop and resistance are fixed.

Questions & Answers

Q: What happens to the total current in a circuit when resistors are added in parallel?

Adding resistors in parallel increases the total current flowing through the circuit due to the addition of another branch for current.

Q: How does adding resistors in parallel affect the total equivalent resistance of the circuit?

The total equivalent resistance of a circuit decreases when resistors are added in parallel because the current increases, leading to lower overall resistance.

Q: Why does the voltage drop across bulbs remain the same when resistors are added in parallel?

The voltage drop across bulbs stays constant in parallel circuits because each bulb is directly connected to a voltage source, ensuring a consistent voltage across them.

Q: Why does the brightness of bulbs stay the same when resistors are added in parallel?

The brightness of bulbs remains unchanged as the current through and voltage across each bulb stay constant, resulting in a consistent power output and brightness.

Summary & Key Takeaways

• Adding resistors in parallel increases total current and decreases total resistance in a circuit.

• The voltage drop across bulbs remains the same, as the current through bulbs also stays constant.

• The brightness of the bulbs does not change as the current and voltage through them remain constant.