How to work out voltage drop across a resistor?
Understand the Problem
The question is asking how to calculate the voltage drop across a resistor in a circuit. This typically involves applying Ohm's Law, which states that voltage (V) equals current (I) multiplied by resistance (R). To find the voltage drop, one would need to know the current flowing through the resistor and its resistance value.
Answer
Use Ohm's Law: $$ V = I \times R $$
Answer for screen readers
To calculate the voltage drop across a resistor, use Ohm's Law: $$ V = I \times R $$. Identify the current (I) and the resistance (R), then multiply them to find the voltage (V).
Steps to Solve
- Identify the given values
Determine the current (I) flowing through the resistor and the resistance (R) of the resistor. These values are necessary to use Ohm's Law.
- Apply Ohm's Law
Ohm's Law is given by the formula: $$V = I imes R$$ where V is the voltage drop, I is the current, and R is the resistance.
- Calculate the voltage drop
Using the current and resistance values, perform the multiplication to find the voltage drop: $$ V = I \times R $$
To calculate the voltage drop across a resistor, use Ohm's Law: $$ V = I \times R $$. Identify the current (I) and the resistance (R), then multiply them to find the voltage (V).
More Information
Ohm's Law is a fundamental principle in electrical engineering, discovered by Georg Simon Ohm. It defines the relationship between voltage, current, and resistance.
Tips
A common mistake is forgetting to match the units or incorrectly applying Ohm's Law. Always ensure you use consistent units when using the formula, such as amps for current and ohms for resistance.