Capacitors in Parallel

Introduction

With the use of capacitors in parallel and in series, it’s possible to create capacitors with different properties and functions. As electric current flows through a capacitor, it creates an opposing charge on each of its plates. As you might guess, each electrode attracts opposite charges that are equal and opposite of one another.

What are they, how do they work, and why would you want to use them? This tutorial will cover all the basics you need to know about capacitors in parallel as well as offer some suggestions on how to use them in your next project.

Capacitors in Parallel

Parallel circuits are wired such that all wires between two points lead to each component, with all components joined by conducting wire. It means the capacitor’s first and second plates are, respectively, connected to the next capacitor’s first and second plates.

Connecting the capacitors in parallel helps to increase the capacitance power. This allows electricity from power sources or batteries to flow freely through each component before being dumped into a final point. We can think of capacitors in parallel as being stacked on top of each other, with all their plates sharing one common electrode.

For example, if we have two equal-valued 1 μFμF capacitors, then we can think of them as being functionally equivalent to a single 2 μFμF capacitor.

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Working of Capacitors in Parallel

When two or more capacitors are connected in parallel, it means we want to increase the storage capacity of the circuit. Their individual capacitance value remains unchanged, while their equivalent capacitance value is calculated using a formula involving all of their values.

Let’s imagine two capacitors C₁ and C₂ are connected in a parallel circuit and the charge Q is divided into Q₁ and Q₂ that respectively flow from C₁ and C₂

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So, the Total charge between a and b is

Q=Q1+Q2Q=Q1+Q2

Q=C1V+C2VQ=C1V+C2V

Q/V=C1+C2Q/V=C1+C2

C=C1+C2C=C1+C2

Where,

• Q = Total Charge in circuit
• V = voltage applied on the circuit
• C = Capacitance power of capacitor

When we add lots of capacitor in parallel than

CT=C1+C2+C3+C4……….+CnCT=C1+C2+C3+C4……….+Cn

Example

Let’s say we have three capacitors; each one has a capacitance of 50 nF. They are then connected in parallel with the 200 supply. Calculate the Equivalent capacitance

Solution:

C1=C2=C3=50×10−9FC1=C2=C3=50×10−9F

Total capacitance in parallel

CT=C1+C2+C3+C4……….+CnCT=C1+C2+C3+C4……….+Cn

CT=(50+50+50)×10−9CT=(50+50+50)×10−9

CT=150nFCT=150nF

Advantages of using Capacitors in Parallel

• A capacitor is a passive electronic component that can store energy and deliver it on demand. When we connected capacitors in parallel, it increases the storage capacity of the circuit.
• When connected to an alternating current, a capacitor resists changes in voltage and has several electrical properties that make it useful as part of an electronics circuit.
• These include its ability to block DC (direct current) while allowing AC (alternating current) signals to pass through. The first thing is simply that, when capacitors are connected in parallel with each other, their voltage decreases proportionally.
• Connecting capacitors in parallel help to reduce the number of resistors that are used in the system.

Disadvantages of using Capacitors in Parallel

• For example, a parallel combination of two 0.1 μFμF capacitors has an equivalent capacitance of 0.2 μFμF because both capacitors will share a voltage drop (Voltage division) of 1 V for every doubling of their total capacitance. If one capacitor is accidentally allowed to discharge through another, there could be more than 4 A transient current through one capacitor if it is charged and discharged quickly. This type of current flow may result in severe damage to either or both units and should be avoided at all costs by not paralleling such components without careful consideration.
• We know that capacitors in parallel is storing a huge amount of energy but they release this energy in a very short span of time. So, this can be caused heavy injuries or damage to the electrical wiring. Because of that reason, it is not used in the industry materials.