# Is Current a Scaler or Vector Quantity?

*Most recent answer: 05/03/2015*

Q:

Our teacher asked us find the authentic reason behind why current is a scalar quantity , so my first question on this forum would be "Why current is a scalar quantity when It has both direction and magnitude ?"

- Reckon (age 20)

Pakistan

- Reckon (age 20)

Pakistan

A:

Hello Reckon,

There is a bit of a problem here. Your teacher may have been only thinking of the value of a current flowing in a wire as read on an ammeter. In that case current is just a scaler number.

However the wire in which the current flows has a direction. Any magnetic field associated with the current will have a direction related to the Biot-Savart Law:

Here, d**l** is a vector element pointing the direction of a wire element. So in this sense current is indeed a vector quantitiy.

LeeH

*(published on 05/03/2015)*