Voltage divider - Looking for a reference with respect to Vout resistnce

Thread starter Femme_physics
Start date Mar 24, 2012
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Reference Voltage Voltage divider

In summary: Any textbook is sufficient resource. What you need is actual experience of doing some calculations to see what happens.I assume that you can work out 1. the equivalent resistor for two in parallel and I assume that the 2. potential divider equation is familiar.Just substitute some numbers in there and you will get a feel for it. There is no definite answer as to 'how much' error is acceptable.I'll accept this :)In summary, you need to add the load resistor in parallel with the resistor across which you are measuring the Vout. The 'bottom resistor' of the pair in the divider has been modified.

Mar 27, 2012

psparky

Gold Member

DragonPetter said:

Oh and to your question of why we use it. There are lots of reasons, but a cool property I can think of is that the waveform you get out of convolving a system's response to an impulse function gives you the entire description of that system.

Now you're talkin...

<h2> What is a voltage divider?</h2><p>A voltage divider is a circuit that divides a given input voltage into smaller output voltages using a series of resistors connected in series. It is commonly used in electronic devices to reduce the voltage level to a desired value.</p><h2> How does a voltage divider work?</h2><p>A voltage divider works by using the principle of Ohm's Law, which states that voltage is directly proportional to current and resistance. By connecting resistors in series, the total resistance of the circuit increases, causing a decrease in the output voltage.</p><h2> What is the purpose of using a voltage divider?</h2><p>The purpose of using a voltage divider is to reduce the voltage level of a circuit to a desired value. This is useful in situations where the input voltage is too high for a particular component or when a specific voltage level is required for proper functioning of a device.</p><h2> What is the relationship between Vout and resistance in a voltage divider?</h2><p>In a voltage divider, the output voltage (Vout) is directly proportional to the resistance of the resistor connected to it. This means that as the resistance increases, the output voltage decreases and vice versa.</p><h2> How do I choose the right resistors for a voltage divider?</h2><p>The choice of resistors for a voltage divider depends on the desired output voltage and the input voltage. The resistors should be selected in a way that the total resistance of the circuit is equal to the desired output voltage divided by the input voltage. It is also important to consider the power rating of the resistors to ensure they can handle the current passing through them.</p>

FAQ: Voltage divider - Looking for a reference with respect to Vout resistnce

What is a voltage divider?

A voltage divider is a circuit that divides a given input voltage into smaller output voltages using a series of resistors connected in series. It is commonly used in electronic devices to reduce the voltage level to a desired value.

How does a voltage divider work?

A voltage divider works by using the principle of Ohm's Law, which states that voltage is directly proportional to current and resistance. By connecting resistors in series, the total resistance of the circuit increases, causing a decrease in the output voltage.

What is the purpose of using a voltage divider?

The purpose of using a voltage divider is to reduce the voltage level of a circuit to a desired value. This is useful in situations where the input voltage is too high for a particular component or when a specific voltage level is required for proper functioning of a device.

What is the relationship between Vout and resistance in a voltage divider?

In a voltage divider, the output voltage (Vout) is directly proportional to the resistance of the resistor connected to it. This means that as the resistance increases, the output voltage decreases and vice versa.

How do I choose the right resistors for a voltage divider?

The choice of resistors for a voltage divider depends on the desired output voltage and the input voltage. The resistors should be selected in a way that the total resistance of the circuit is equal to the desired output voltage divided by the input voltage. It is also important to consider the power rating of the resistors to ensure they can handle the current passing through them.