# Why do we use dependent sources in circuit analysis?

## Why do we use dependent sources in circuit analysis?

Dependent sources are used to model transistors and the operational amplifier IC. A dependent source is a voltage or current source controlled by either a voltage or a current at the input side of the device model. The dependent source drives the output side of the circuit.

**What do you mean by dependent and independent voltage source?**

An independent voltage source maintains a voltage (fixed or varying with time) which is not affected by any other quantity. They are called dependent voltage (current) sources or controlled voltage (current) sources , and their usual symbols are shown in figure 1.4.

### What is mesh and nodal analysis?

The difference between mesh and nodal analysis is that nodal analysis is an application of Kirchhoff’s current law, which is used for calculating the voltages at each node in an equation. While mesh analysis is an application of Kirchhoff’s voltage law which is used for calculating the current.

**How do you solve nodal analysis problems?**

Procedure of Nodal Analysis

- Step 1 − Identify the principal nodes and choose one of them as reference node.
- Step 2 − Label the node voltages with respect to Ground from all the principal nodes except the reference node.
- Step 3 − Write nodal equations at all the principal nodes except the reference node.

## How do you find the dependent voltage source of a mesh?

The dependent voltage source is a ratio and not a fixed number at this point. To be able to solve this system, we need to write the formula for VX. This is found multiplying the resistance 200 Ω by the current. Since this resistor is used by both meshes, the current is: V X will be annotated as “c” for the solver.

**What is mesh analysis with Dependent sources?**

This article describes the technical aspects of Performing Mesh analysis with Dependent Sources. This article describes the technical aspects of Performing Mesh analysis with Dependent Sources. Mesh analysis is a very handy tool to compute current within electronic circuits.

### What is a dependent current source in a circuit?

A dependent source is a current or voltage source whose value is not fixed. Instead, the value depends on some other circuit current or voltage. The general form for the value of a dependent source is N = k M where M and N are currents and/or voltages and k is the proportionality constant.

**What is the value of a dependent voltage source?**

For example, the value of a dependent voltage source may be a function of a current, so instead of the source being equal to, say, 10 volts, it could be equal to twenty times the current passing through a particular resistor, or v = 20 i.