Voltage And Current

Some countries have more than one voltage available.

Voltage and current. Voltage is the cause and current is its effect. Just like voltage resistance is a quantity relative between two points. Written by willy mcallister. Current is the effect voltage being the cause.

Voltage frequency and plug type vary but large regions may use common standards. Whether ac or dc current only flows through a circuit when a voltage source is connected to it with its flow being limited to both the resistance of the circuit and the voltage source pushing it. This is the currently selected item. Voltage is represented in equations and schematics by the letter v.

So for this analogy remember. In other words the source is an active network element meant for generating electrical energy. Ohm s law and circuits with resistors. For example in north america most sockets are attached to a 120 v supply but there is a 240 v supply available for large appliances.

Introduction to circuits and ohm s law. V or volts or voltage. Relationship between voltage and current is described in the equation of ohm s law v ir. Current that flows in a single direction is called direct current or d c.

1 volt 1 joule coulomb. Voltage source and current source a source is a device which converts mechanical chemical thermal or some other form of energy into electrical energy. The basic difference between voltage and current is that voltage is the amount of energy per charge which is required to move electrons from one point to another while current is the rate of flow of charges. And current that alternates back and forth through the circuit is known as alternating current or a c.

For this reason the quantities of voltage and resistance are often stated as being between or across two points in a circuit. Google classroom facebook twitter. The amount of current in a circuit depends on the amount of voltage and the amount of resistance in the circuit to oppose current flow. Current cannot flow without voltage.

1 ampere 1 coulomb second. Voltage as an expression of potential energy is always relative between two locations or points. In this analogy charge is represented by the water amount voltage is represented by the water pressure and current is represented by the water flow. Therefore the conventional current in a wire or resistor always flows from higher voltage to lower voltage.

Voltage can exist without current. Sometimes it is called a voltage drop when a voltage source is connected to a circuit the voltage will cause a uniform flow of charge carriers through that circuit called a current. When describing voltage current and resistance a common analogy is a water tank. Often different sockets are mandated for different voltage or current levels.