MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: R

There are no items in this cart.
Continue Shopping
Menu
Get instant 20% OFF on Online Material.
coupon code: MOB20 | View Course list

  • Complete Physics Course - Class 11
  • OFFERED PRICE: R 2,800
  • View Details
Get extra R 2,800 off
USE CODE: askschfd09

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

7 years ago

Share

Answers : (2)

										

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.

6 years ago
										Current and voltage are vector product in a.c. only in wave from .       In d.c. current is scaler product because it has only one sign and can not get resolved it.
										
one month ago

Post Your Answer

Other Related Questions on Electric Current

Define ohm’s law?
 
 
Ohms law is the besic law in electric current which is given by george simon ohm, it states that when the equilibrium condition is maintained and with constant temp and pressure the...
 
Umakant biswal one year ago
 
Dear Students, We noticed that some students are copying and pasting same answer that has posted by previous users. Also, they are creating multiple account to post question and then...
 
Forum Team one year ago
 
The predominant equation which pervades the study of electric circuits is the equation ΔV = I • R In words, the electric potential difference between two points on a circuit ( ΔV ) is...
 
SAI SARDAR one year ago
What is the statement of WHEAT STONE BRIDGE?????????????????????
 
 
Gowri Sankar, Wheat stone bridge is the four arms are engaged with four resistors and one is unknown resistor.To know the resistance of unknown resistor we used the wheat stone bridge.
 
SAI SARDAR 11 months ago
 
Dear Gowri Shankar A wheat stone is a electrical circuit used to measure the an unknown electrical resistance by balancing two legs of a bridge circuit ,one leg which includes the unknown...
 
Prabhakar ch 11 months ago
 
Hello Shankar, Definition of Wheatstone bridge . : an electrical bridge consisting of two branches of a parallel circuit joined by a galvanometer and used for determining the value of an...
 
SAI SANDY 11 months ago
What are the measurements of DC AND AC CIRCUITS???????//
 
 
Gowri Sankar, The measurements of AC and DC currents in a circuit is Amperes or Coloumb per second......
 
SAI SARDAR 11 months ago
 
Hello Gowri The SI unit for measuring an electric current is the ampere, which is the flow of electric charge across a surface at the rate of one coulomb per second. Electric current is...
 
Gaddam Chethan 11 months ago
 
Hello Gowri The SI unit for measuring an electric current is the ampere, which is the flow of electric charge across a surface at the rate of one coulomb per second. Electric current is...
 
manichandra 11 months ago
what is work energy thereom...................................?
 
 
For any net force acting on a particle moving along any curvilinear path, it can be demonstrated that its work equals the change in the kinetic energy of the particle by a simple derivation...
 
rahul kushwaha 2 months ago
 
To change the kinetic energy of a particle we have to apply a force on it and the force must do work on it. This relationship between KE and WORK is called "work -energy theorem...
 
Ankur Saha 2 months ago
 
Relation bewteen KE and W: The work done on an object by a net force equals the change in kinetic energy of the object: W = KEf - KEi. This relationship is called the work-energy theorem.
 
Shreyas Patil 3 months ago
 
The amount of work done by the net force acting on a particle is equal change in it’s kinetic energy.
 
5 days ago
 
work energy therom is nothing but the total work done by all forces is equal to the change in its kinetic energy …. W=1/2 {kx 2 2 -kx 1 2 }
 
5 days ago
 
Total workdone by the Net Force on the body is equal to change in it’s kinetic energy . W total =1/2{kx 2 2 -kx 1 2 }
 
5 days ago
The cieling of long hall is 25 m high What is the maximum horizontal distance that a ball thrown with a speed of 40 ms can go without hitting the ceiling of wall? Plz explain with a DIAGRAM
 
 
Let the angle of throwing be Q with respect to the ground So, the range is R = 40*cosQ*t where t = time taken reach ground. Now, we know the time taken to reach the top of its flight is...
 
Tapas Khanda 3 months ago
 
Let the angle of throwing be Q with respect to the ground So, the range is R = 30*cosQ*t where t = time taken reach ground. Now, we know the time taken to reach the top of its flight is...
 
Tapas Khanda 3 months ago
 
Diagram is not required to solve this question. You can directly use the formula to find range : R = (v^2/g)*sin2Q Maximum height reached, H = v^2*sin^2Q/2g So, 25 = 40^2*sin^2Q/(2*9.8) So, ...
 
Tapas Khanda 3 months ago
a particle of mass m starts moving from origin along x axis and its velocity varies with position (x) as v=k√x. the work done by force acting on it during first "t" seconds is ???ans) (m k^4...
 
 
I want you to recheck your answer mr strange...you had written the value of a as k^2 ÷ 4 and you put that value at last as k^2 ÷ 2....Overall if u cann xplain it in brief i wud be...
 
Vaibhav 19 days ago
 
sry it was a mistake , this is right.......... :) …...........................................................................................
 
DR STRANGE 19 days ago
 
I dont understand how did you got (k dx)/(2√x dt).....and also this the integration of dx/√x should be x/2 but u wrote 2x how???
 
Vaibhav 19 days ago
View all Questions »

  • Complete Physics Course - Class 12
  • OFFERED PRICE: R 2,600
  • View Details
Get extra R 2,600 off
USE CODE: askschfd09

  • Complete Physics Course - Class 11
  • OFFERED PRICE: R 2,800
  • View Details

Get extra R 2,800 off
USE CODE: askschfd09

More Questions On Electric Current

Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!!
Click Here for details