Describe How Voltage Difference Causes Current To Flow

Voltage also known as electromotive force is often defined as the pressure of the electrons in a system it can be likened to the water pressure in a pipe.

Describe how voltage difference causes current to flow. 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. V i x r. Hence the first cause is voltage which leads to current flow. Thus a voltage difference is required for the flow of charge.

A potential difference voltage across an electrical component is needed to make a current flow through it. 230 to 250 volts. Current is the rate at which charge is flowing. This is from ohm s law which states that potential difference between 2 points causes flow of electric current and not vice versa.

Flow of charge. As per my understanding only a voltage can cause a current and not the other way around endgroup hannibal2469 nov 21 15 at 21 11. No coils current flows according to ohm s law which is shown below. The potential difference between the two causes the electrons to be attracted back producing a flow of electric charge.

The standard circuits in your home carry either about 120 volts the actual voltage can vary between about 115 to 125 volts or 240 volts actual range. Voltage as an expression of potential energy is always relative between two locations or points. Whereas current is a dependent quantity w r t voltage. Negatively charged electrons are removed from atoms the atoms being left as positive ions.

A free positive charge move from a region of higher potential to that of lower potential whereas a free negative charge moves from lower potential region to a higher potential. Direction of conventional current is from positive terminal to negative terminal. Ohm s law is the most important basic law of electricity. In electrical engineering there is a basic equation that explains how voltage current and resistance relate.

Marek jagoda eyeem getty images. This is the basis of current electricity. This equation written below is known as ohm s law. Begingroup thanks for the response but even in your explanation it seems that a voltage difference would have to exist apriori how can charge flow cause a voltage difference.

Voltage is the difference in charge between two points. Current voltage and resistance when a voltage is applied to a circuit containing only resistive elements i e. Voltage is an independent quantit w r t current. I v r.

Resistance is a material s tendency to resist the flow of charge current. Current voltage and resistance current is the rate of flow of electric charge. It defines the relationship between the three fundamental electrical quantities. So when we talk about these values we re really describing the movement of charge and thus the behavior of electrons.