why should ac current is a vector quantity but dc current is a scalar quantity

4 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.

4 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
A person is standing on a truck moving with a constant velocity 15 m/s. The man throws a ball in such a way that it returns to his hand after the truck has moved 60 m. Find speed and angle...
see ... the ball will now have an horizontal as well as a vertical velocity ..... the horizontal velocity would be the same as the velocity of the truck ... due to inertia .. that is 15m/s...
saraana clinton 9 months ago
Since the ball returns to the hand after traveling for 60m at a speed 15m/s, time period, T = 60/15 = 4s. As seen from the truck, the ball is obviously thrown at angle of 90, as it cannot...
Ashwin Maran 9 months ago
i am sorry there was a mistake in my answer... the vertical velocity would be u sin theta not u cos theta ... where theta is the angle of projection... and i am quite a little sure that the...
saraana clinton 9 months ago
can inner shell electrons take part in conduction by any method??
I don`t think so. I believe electrons only in outer class takes part in conduction
Pushkar Aditya 9 months ago
when a dielectric slab of thickness 6 cm is introduced between the plates of parallel plate condenser, it is found that the distance between the plates has to be increased by 4 cm to restore...
let Co=eA/D let c1= keA/(D+6) keA/(D+6+10)=eA/(D) k=(D+16)/D sher mohammad askiitians faculty b.tech, iit delhi
Sher Mohammad 5 months ago
can an extended source of monochromatic light be used to produce coherent sources?
dearfriend when the monocromatic light is exchangad don''t produce coharent sources THANKYOU
suhel one year ago
i want easy way to solve complex capcitor circuits.. what kcl , kvl method of solving capacitor
This law is also called Kirchhoff's first law, Kirchhoff's point rule, or Kirchhoff's junction rule (or nodal rule). The principle of conservation of electric charge implies...
Suraj Prasad one month ago
View all Questions »