Quick Answer: What Is Electric Current And Its Formula?

How do I calculate power?

Power equals work (J) divided by time (s).

The SI unit for power is the watt (W), which equals 1 joule of work per second (J/s).

Power may be measured in a unit called the horsepower..

How do you find minimum power?

If you are trying to calculate the minimum load and you happen to only know the power and voltage ratings of your power supply, you can use the formula P = V2/R, which can become R = V2/P.

What are types of current?

There are two kinds of current electricity: direct current (DC) and alternating current (AC). With direct current, electrons move in one direction. Batteries produce direct current. In alternating current, electrons flow in both directions.

What is electricity in simple words?

Electricity is the presence and flow of electric charge. Using electricity we can transfer energy in ways that allow us to do simple chores. Its best-known form is the flow of electrons through conductors such as copper wires. The word “electricity” is sometimes used to mean “electrical energy”.

What is the electric current?

An electric current is a flow of electric charge in a circuit. More specifically, the electric current is the rate of charge flow past a given point in an electric circuit. The charge can be negatively charged electrons or positive charge carriers including protons, positive ions or holes.

What is Ampere formula?

Since power is defined as the product of current and voltage, the ampere can alternatively be expressed in terms of the other units using the relationship I = P/V, and thus 1 A = 1 W/V. Current can be measured by a multimeter, a device that can measure electrical voltage, current, and resistance.

What is the symbol for current?

The conventional symbol for current is I, which originates from the French phrase intensité du courant, (current intensity). Current intensity is often referred to simply as current. The I symbol was used by André-Marie Ampère, after whom the unit of electric current is named, in formulating Ampère’s force law (1820).

What is SI unit of electric charge?

Coulomb, unit of electric charge in the metre-kilogram-second-ampere system, the basis of the SI system of physical units. It is abbreviated as C. The coulomb is defined as the quantity of electricity transported in one second by a current of one ampere.

What is the use of current?

It is mostly used in low voltage applications such as charging batteries, aircraft applications, etc. Alternating current is used to operate appliances for both household and industrial and commercial use. The electric current is measured in ampere.

What is current explain?

Current is the rate at which electrons flow past a point in a complete electrical circuit. … It expresses the quantity of electrons (sometimes called “electrical charge”) flowing past a point in a circuit over a given time.

What is electric current class 10th?

Electric Current: The flow of electric charge is known as electric current. Electric current is carried by moving electrons through a conductor. … Electric current is expressed by the rate of flow of electric charges. Rate of flow means the amount of charge flowing through a particular area in unit time.

What is work formula?

We can calculate work by multiplying the force by the movement of the object. W = F × d. Unit. The SI unit of work is the joule (J)

What is Ohm’s law state?

Ohm’s law, description of the relationship between current, voltage, and resistance. The amount of steady current through a large number of materials is directly proportional to the potential difference, or voltage, across the materials. … Ohm’s law may be expressed mathematically as V/I = R.

What is wattage formula?

The formula for calculating wattage is: W (joules per second) = V (joules per coulomb) x A (coulombs per second) where W is watts, V is volts, and A is amperes of current. In practical terms, wattage is the power produced or used per second.

What is the difference between current and electricity?

Current is a general characteristic of electricity, like voltage and resistance. It’s a name given to the flow of electrons (charge) through a medium. Electricity is a generic name that’s used for the common flow of energy to power all the electric stuff. … Current in general refers to any flow.

What is needed for electricity flow?

To produce an electric current, three things are needed: a supply of electric charges (electrons) which are free to flow, some form of push to move the charges through the circuit and a pathway to carry the charges. … The flow of electricity can be likened to a flow of water through a pipe.

What is formula of electric current?

The electric current is given by: I = V / R. Corresponding units: ampere (A) = volt (V) / ohm (Ω) This formula is derived from Ohm’s law.

What is current and formula of current?

From the electric current formula: I= V/R = 5 V / 2 ohms = 2.5 A. 2) A wire is connected to a battery with a voltage of 5 V. Its resistance is 100 ohms. What is current flowing?