# Blog

## What is the current density of a wire? ## How do you calculate the current density of a copper busbar?

THUMB Rule for Busbar : For Aluminium : 0.7 Amps / 1 Sq.mm of Bar. For Copper : 1.2 Amps / 1 Sq.mm of Copper.Dec 21, 2015

## What is difference between current and current density?

Electric Current is the flow of electrons through a conductor and it is scalar quantity. whereas Current density is the flow of electron through conductor per unit cross sectional area perpendicular to flow of current.

## What is surface current density?

when charge flows over a surface, we describe it by the surface current density, K. Consider a 'ribbon' of infinitesimal width dL running parallel to the current flow. If the current in this ribbon is dI, surface current density is K=dI/dL.

## WHAT IS A in current density?

Corrosionpedia Explains Current Density

meter. I = Electric current flowing through a given material or a conductor in amperes. A = Cross-sectional area of a material or a conductor in square meters.
Aug 14, 2018  ### How do I calculate current?

The current is the ratio of the potential difference and the resistance. It is represented as (I). The current formula is given as I = V/R. The SI unit of current is Ampere (Amp).

### How do you find the current carrying capacity of a copper bar?

Copper Busbar current carrying capacity:

Which means, take a copper bus bar of 100 mm width and 10 mm thickness, the area of the copper bus bar is 10 * 100 sqmm. The total current carrying capacity of the busbar is 1.2 * area => 1000 sqmm* 1.2 =1200 Amps.

### How do you calculate current busbar rating?

Bus bar Cross Section Area as per Current= 697 / 1.6. Bus bar Cross Section Area as per Current= 436 Sq.mm. Bus bar Cross Section Area as per Short Circuit= Isc X√ ((K/( θtx100)x(1+ α20xθ) xt. Bus bar Cross Section Area as per Short Circuit= 50000X√ ((1.166/( 100×100)x(1+ 0.00403×85) x1.Aug 5, 2014

### Is current density scalar or vector?

Despite being the ratio of two scalar quantities, current density is a vector.

### How do you increase current density?

Current density increase with time at a constant voltage during electrodeposition can be due to the reasons: Increase of a true electrode surface area due to the formation of a new phase. Unsteady mixing regime. Increased electrolyte temperature .

### What problem is caused by high current density?

High current density puts significant demands on the oxygen transport mechanism, and partial air starvation may occur, resulting in low-performing cells and may accelerate end-of-life due to insufficient power production (see Section 6.4. 1).

### Does copper have a high density?

• Copper doesn’t have a particularly high density in this respect, it fits quite nicely within trends in the periodic table to the left and below. However a better question might be why it is so much more dense than zinc, which is just to the right of it on the periodic table.

### How do you calculate density of copper?

• Subtract the initial volume from the final volume to determine the volume of the item. Multiply the volume of the item by the density of the material. For example, if you have 48 cubic inches of copper and the density of copper is 0.324 lbs per cubic inch, the mass of the object would be 15.552 pounds.

### What is the density of copper at room temperature?

• DENSITY OF COPPER. The density of copper is 8.96 g/cm3 (8960 kg/m3, 559 lb/ft3, 0.324 lb/ in3) at room temperature. Following copper density table shows density of copper alloys including brass and bronze.

### What is the formula for current density?

• Current Density Formula is expressed as, J = I / A. Where, I denotes the current flowing through the conductor in Amperes and. A denotes the cross section area in m2. Current density is expressed In A/m2. Example 1. A 5 mm2 copper wire has a current of 5 mA of current flowing through it.