The charge of an electron is 1.6 x 10 ^{–}^{19} C. In other words, it takes 6,250,000,000,000,000,000 electrons to make up 1 coulomb of charge. A coulomb of charge is just a very large group of electrons.

The relationship between current I and quantity of charge Q.

I = | I = Q ÷ t |
---|---|

Q = It | Q = I x t |

t = | t = Q ÷ I |

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## How do you calculate charge?

If you know the potential difference (V) in volts applied in a circuit and the work (W) in joules done over the period which it is applied, the charge in coulombs, Q = W / V.

## What is current formula?

The current formula is given as I = V/R. The SI unit of current is Ampere (Amp).

## What is the formula for specific charge?

The specific charge of a particle is the ratio of its charge to its mass, given in coulombs per kilogram (C kg–1). To calculate specific charge, you just divide the charge in C by the mass in kg.

## What’s the equation for efficiency?

Efficiency = useful power out ÷ total power in For example, an efficiency of 0.25 is the same as an efficiency of 25%. Because some energy is always wasted from every device, efficiency should always be less than 1 or less than 100%.

## What are the 3 types of charging?

In order to charge an object, one has to alter the charge balance of positive and negative charges. There are three ways to do it: friction, conduction and induction.

## What is Q equal to in physics?

q is the symbol used to represent charge, while n is a positive or negative integer, and e is the electronic charge, 1.60 x 10^{–}^{19} Coulombs.

## What is E equal to in physics?

Electron charge, (symbol e), fundamental physical constant expressing the naturally occurring unit of electric charge, equal to 1.602176634 × 10^{−}^{19} coulomb.

## How do you calculate total current?

What is the formula for a total current? IT = VT/RT or I total = V total / R total or the total current = the total voltage / the total resistance.

## 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.