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Difference Between Charge & Current The most significant  difference  between the  charge  and the  current  is that the  charge  is the  physical property  of  matter , whereas the  current  is the  rate  of  flow  of  charges . Some other differences between charge and current are explained below in the tabular form. The electric charge is the physical property of matter which experiences the force when placed in an electric filed. It is of three types positive, negative and neutral. When these charges (generally electrons) move in the particular direction its generate current. And this current is used for illumination and mechanical works. Content: Charge Vs Current : Comparison Chart  Definition  Key Differences  Conclusion Comparison Chart : Basis For Comparison Charge Current Definition It is a physical property of particles which allow them to inte...

Difference Between Voltage &  Current The voltage and current are the two major aspects of electricity.The voltage is the type of the electromagnetic force whose effect causes the flow of electrical current in the circuit. The magnitude of a voltage and current depends on each other, but these two terms are different from each other in some ways. One of the major differences between voltage and current is that the voltage is the difference between the two points and the current is the flow of electrical charges between these two points of an electric field. Some others differences between them are explained below in the comparison chart. Content: Voltage Vs Current : Comparison Chart Definition  Key Differences  Conclusion Comparison Chart : Basis for Comparison Voltage Current Definition Difference between two points of an electric field Flow of charges between two points Unit Volt Ampere Symbol V I Formula Field Created Magnetic Fie...

Electric Current Definition : Electric current is defined as the rate of flow of negative charges of the conductor. In other words, the continuous flow of electrons in an electric circuit is called an electric current.The conducting material consists a large number of free electrons which move from one atom to the other at random. Unit of Current : Since the charge is measured in coulombs and time in seconds, so the unit of electric current is coulomb/Sec ( C/s ) or amperes ( A ). The amperes is the  SI  unit of the conductor. The  I  is the symbolic representation of the current. Current Folw  Q= 1 Coulomb; t = 1 Second; then I = 1A Thus, a wire is said to carry a current of one ampere when charge flows through it at the rate of one coulomb per second. When an electrical potential difference is applied across the metallic wire, the loosely attached free electrons start moving towards the positive terminal of the cell shown in the figure bel...

Electronic Switches : The electronic switches are generally called as solid state switches because there are no physical moving parts and hence absence of physical contacts. Most of the appliances are controlled by semiconductor switches such as motor drives and HVAC equipments. There are different types of solid state switches are available in today market with different sizes and ratings. Some of these solid state switches include transistors, SCRs, MOSFETs, TRIACs and IGBTs. Bipolar Transistors : A transistor either allows the current to pass or it blocks the current as similar to working of normal switch. In switching circuits, transistor operates in cut-off mode for OFF or current blocking condition and in saturation mode for ON condition. The active region of the transistor is not used for switching applications. Both NPN and PNP transistors are operated or switched ON when a sufficient base current is supplied to it. When a small current flows though the base t...

What is an Electrical Switch : An electrical switch is any device used to interrupt the flow of electrons in a circuit. Switches are essentially binary devices: they are either completely on (“closed”) or completely off (“open”). There are many different types of switches, and we will explore some of these types in this chapter. Learn the Different Types of Switches : Switches can be of mechanical or electronic type, Mechanical switches  must be activated physically, by moving, pressing, releasing, or touching its contacts. Electronic switches  do not require any physical contact in order to control a circuit. These are activated by semiconductor action. Mechanical Switches : Mechanical switches can be classified into different types based on several factors such as method of actuation (manual, limit and process switches), number of contacts (single contact and multi contact switches), number of poles and throws (SPST, DPDT, SPDT, etc.), operation and ...