How To Calculate The Current In a Parallel Circuit Using Ohm's Law | Summary and Q&A

TL;DR

Learn how to calculate the current flowing in parallel circuit configurations using Ohm's law and formulas.

Key Insights

• 💐 Current flowing in a parallel circuit splits into different pathways through multiple resistors.
• 👮 Ohm's law (voltage = current * resistance) is used to calculate the currents through each resistor.
• 🍹 The total current in a parallel circuit is the sum of the currents through each resistor.

Transcript

let's begin with a circuit so let's say we have a battery and it's connected across two resistors that are connected parallel to each other so here we have the positive terminal of the battery and this is the negative terminal and we're going to use a 12 volt battery and this is going to be a 6 ohm resistor let's call it r1 and r2 will be a 4 ohm r... Read More

Questions & Answers

Q: How can you calculate the total current flowing in a parallel circuit with two resistors?

To calculate the total current, find the individual currents flowing through each resistor using Ohm's law. Then, add these currents together to find the total current in the circuit.

Q: What is the formula used to calculate the current flowing through a resistor in a parallel circuit?

The formula is i1 = (r2 / (r1 + r2)) * it, where i1 is the current flowing through resistor 1, r1 and r2 are the resistances of the resistors, and it is the total current in the circuit.

Q: How does the current change when the resistance of a resistor in a parallel circuit decreases?

In a parallel circuit, as the resistance of a resistor decreases, the current flowing through that resistor will increase. This is because, with a lower resistance, less opposition is present to the flow of electric current.

Q: Can the current flowing through a resistor in a parallel circuit ever be higher than the total current?

No, the current flowing through a resistor in a parallel circuit cannot be higher than the total current. The total current is the sum of the currents flowing through each resistor, so the individual currents cannot exceed the total.

Summary & Key Takeaways

• The video explains how to calculate the current flowing in a parallel circuit with two resistors. By using Ohm's law (voltage equals current multiplied by resistance), you can determine the individual currents (i1 and i2) flowing through each resistor.

• A second example introduces a parallel circuit with three resistors, showing that the process for calculating current remains the same.

• Lastly, the video demonstrates how to find the current flowing through a resistor in a circuit when given the total current and resistor values.