# What is the purpose of a voltage divider?

## What is the purpose of a voltage divider?

A voltage divider is a simple circuit which turns a large voltage into a smaller one. Using just two series resistors and an input voltage, we can create an output voltage that is a fraction of the input. Voltage dividers are one of the most fundamental circuits in electronics.

### What is voltage divider current?

Voltage Dividers. Voltage Divider circuits are used to produce different voltage levels from a common voltage source but the current is the same for all components in a series cicruit. Voltage Divider Circuits are useful in providing different voltage levels from a common supply voltage.

**How do you reduce 12 volts to 9 volts?**

To reduce a 12V circuit to 9V, place two resistors in series within the circuit. Find the difference between the two voltages (12V – 9V = 3V) to determine the total amount of resistance needed.

**How do you reduce voltage from 12v to 5V with a resistor?**

To divide voltage in half, all you must do is place any 2 resistors of equal value in series and then place a jumper wire in between the resistors. At this point where the jumper wire is placed, the voltage will be one-half the value of the voltage supplying the circuit. The 5V is now 2.5V.

## Are voltage dividers efficient?

Power Efficiency This reveals another interesting fact about voltage dividers; in their simple form, they are very power inefficient. Using smaller resistors to account for load resistance changes means that more power is wasted.

### What is the difference between a voltage divider and a current divider?

Voltage dividers are used in a variety of applications like variable resistors (potentiometer), LDR, thermistors and cutting-edge devices like an accelerometer. Current divider circuits are mainly used to simplify circuits that would make predictions of resistor selection easy.

**Why does a voltage divider need two resistors?**

why do you need 2 resistors (1 to ground), to divide the voltage? One resistor can be used to drop voltage (if the load draws current) but to divide voltage you need something to create a division ratio. To be a voltage divider the output voltage needs to be a constant proportion of the input voltage.

**How do you restrict current in a circuit?**

Current limiting components

- Fuse and Resistors. These are used for simple limiting of current.
- Circuit Breakers. Circuit breakers are used to cut off power just like the fuse, but their response is slower and might not effective for sensitive circuits.
- Thermistors.
- Transistors and Diodes.
- Current limiting diodes.

## Why do you need 2 resistors for a voltage divider?

### Why is voltage divider not efficient?

A voltage divider is not an appropriate replacement for a voltage regulator if you want to draw any significant amount of power. This is because the output is high impedance. The source impedance will be equivalent to the parallel combination of the two resistors.

**What is the purpose of current divider?**

The Current Divider Rule allows us to calculate the current flowing through each parallel resistive branch as a percentage of the total current.

**When would you use a current divider?**

The Current divider rule is used when two or more circuit elements are connected in parallel with the voltage source or the current source.