# Current : Is it a vector or a scalar quantity?

#### robotic94

Ty #### Sana101

Current is a scalar quantity.

The only vector quantities we study of are - Displacement, velocity, acceleration, momentum, moments, force (weight), and electric field strength.

• Sanis

#### thunderingthunder

Current is a scaler quantity because only the displacement is taken in to account #### Agassi Cazaubon

Also it's useful to know the product of two vector quantities is a scalar quantity.

#### umarashraf

Also it's useful to know the product of two vector quantities is a scalar quantity.
so u mean Force into Displacement covered (moment arm) = torque is a scalar quantity..???

#### Agassi Cazaubon

so u mean Force into Displacement covered (moment arm) = torque is a scalar quantity..???

and force into velocity = momentum is a scalar quantity??
I have no idea what you just said, rephrase that lol

#### DragonCub

Also it's useful to know the product of two vector quantities is a scalar quantity.
Yeah it's like the addition and subtraction of odd and even numbers This is quite useful.

#### DragonCub

Ty You can regard current as a quantity with only one direction. Then it is a scalar. #### WhereAmazingHappens

In kirchoff's law if current is flowing in the opposite direction, we take the current as negative? i am not sure if current is a vector or scalar.
please clarify #### Amy farvin

vector quantities have both magnitude and direction. but scalar quantities only magnitude.
current have only a magnitude and no direction coz direction tells if its positive or negative.. accordingly current have no direction so its a scalar quantity. am i correct • thunderingthunder

#### Amy farvin

umarashraf
i think torque is scalar. till now i havent come across anything which says torque is negative which makes it to have a direction. since there is no direction its scalar. #### thunderingthunder

umarashraf
i think torque is scalar. till now i havent come across anything which says torque is negative which makes it to have a direction. since there is no direction its scalar. Torque is a vector quantity.It is a vector or cross product of moment arm and force and its direction is perpendicular to the plane containing force and moment arm. Torque is maximum when the angle between force and moment arm is 90 degree and it is zero when force and moment arm are parallel or anti parallel.

• Amy farvin

#### thunderingthunder

In kirchoff's law if current is flowing in the opposite direction, we take the current as negative? i am not sure if current is a vector or scalar.
please clarify Current is a scaler quantity. As we know, if two currents meet at a junction, the total current of the resultant current will be the algebraic sum of the two current and not the vector sum.For current only the magnitude is taken into account,and not the direction.Also,current does not the follow the parallelogram law of vector addition. Hope this helps #### WhereAmazingHappens

Current is a scaler quantity. As we know, if two currents meet at a junction, the total current of the resultant current will be the algebraic sum of the two current and not the vector sum.For current only the magnitude is taken into account,and not the direction.Also,current does not the follow the parallelogram law of vector addition. Hope this helps k thanks

• thunderingthunder

#### umarashraf

umarashraf
i think torque is scalar. till now i havent come across anything which says torque is negative which makes it to have a direction. since there is no direction its scalar. am afraid bro.. torque is for sure a vector quantity.... it has same direction as the direction of applied force...

#### thunderingthunder

am afraid bro.. torque is for sure a vector quantity.... it has same direction as the direction of applied force...
very right Torque is a vector quantity as both the magnitude as well as the direction are considered..plus it also follows the parallelogram law of vector addition • Amy farvin

#### umarashraf

In kirchoff's law if current is flowing in the opposite direction, we take the current as negative? i am not sure if current is a vector or scalar.
please clarify current is a scalar quantity.. although it has direction and magnitude as well... but it does not obey the law of vector additions mate... so it is not regarded as a vector quantity...

#### WhereAmazingHappens

current is a scalar quantity.. although it has direction and magnitude as well... but it does not obey the law of vector additions mate... so it is not regarded as a vector quantity...
thanks

#### Amy farvin

Torque is a vector quantity.It is a vector or cross product of moment arm and force and its direction is perpendicular to the plane containing force and moment arm. Torque is maximum when the angle between force and moment arm is 90 degree and it is zero when force and moment arm are parallel or anti parallel.
thanx i get it now #### thunderingthunder

thanx i get it now My pleasure • Amy farvin