Total Price: R

There are no items in this cart.
Continue Shopping
                   why should ac current is a vector quantity but dc current is a scalar quantity

5 years ago


Answers : (1)


Electricity may be static or dynamic (electric current)
Static electricity is scalar though it can be + or - signs, but nothing other than that.

Coming to current electricity, the dc current is scalar, as it has only one sign and does not get resolved.

Alternating current is vector. The current and voltages are not in the same direction always. Consider a capacitor for example, it may have a voltage of 100 V applied to it and might have current of 0.1 Amperes, but the power is still zero as the phase difference between current and voltage in case of capacitor is 90 degrees. In resistor it is 0 degrees. If you have series connection of capacitor and resistor, the angle between voltage and current will be between zero and 90 degrees.
The current can be resolved in direction of voltage and quadrature to it. Therefore, the alternating current is a vector.

5 years ago

Post Your Answer

More Questions On Electric Current

Ask Experts

Have any Question? Ask Experts

Post Question

Answer ‘n’ Earn
Attractive Gift
To Win!!!
Click Here for details
Two coils of resistance 3 Ohm and 6 Ohm . are connected in series across a battery of emf 12v . find electrical energy consumed in 1 min in each resistance when these are connected in...
Dear Student There is something missing in the answer by book because you were to calculate energy in each resistance which is not same in the two resistors. The complete answer should be...
shashi K Sharma 9 months ago
what is the Comparison of emf and potential difference
1. The difference of potentials between the two terminals of a cell in an open circuit is called the electromotive force (emf) of a cell. The difference in potentials between any two points ...
gdbusher 10 days ago
state true or false with explanation: a capacitor which is charged to a certain potential using batery , and now battery is removed and capacitor is then connected to an uncharged capacitor ...
This is a good problem asked in JEE exam, I will not give you the full solution, but try to get the concept from the example i am giving, then tell me what is in linked with the concept.....
Saurabh Kumar 8 months ago
what is Double refraction
Double refraction , also called birefringence , an optical property in which a single ray of unpolarized light entering an anisotropic medium is split into two rays, each traveling in a...
noogler 9 days ago
the separation of a ray of light into two unequally refracted, plane-polarized rays of orthogonal polarizations, occurring in crystals in which the velocity of light rays is not the same in ...
rahul 9 days ago
what is the kirchooff integral theorem and its applications
Kirchhoff's integral theorem uses Green's identities to derive the solution to the homogeneous wave equation at an arbitrary point P in terms of the values of the solution of the...
Yash Baheti 9 months ago
derive continuity equation
Let us consider a tube AB of varing cross-section with water is flowing through that tube. At side A, area of cross-section be `A1` velocity of fluid be `v1` At side B, area of cross-section...
chaitnyakishore one year ago
Consider the mass of a fluid entering a at A in `t` seconds M1=density*A1*V1*t Mass of the fluid leaving the tube at B in `t` seconds M2=A2*density*V2*t We know that M1=M2,...
sivakrishna one year ago
p1a1v1=p2a2v2 or A1V1=A2V2
mohammad one year ago
View all Questions »