Which of the following is a scalar quantity?
Correct answer: A. Electric Current
- A. Electric Current
- B. Electric field
- C. Acceleration
- D. Linear Momentum
Explanation
Electric current is a scalar quantity. Any physical quantity is defined as a vector quantity when the quantity has both magnitude and direction but there are some other factors which show that electric current is a scalar quantity . When two currents meet at a point the resultant current will be an algebraic sum. In scalar quantities, normal rules of algebra are applicable while in vector quantities different sets of rules are applicable. That's why we can say that electric current is a scalar quantity.
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About Vectors and Equilibrium
Vectors have magnitude and direction, unlike scalars, and are combined by head-to-tail or parallelogram methods. Work covers rectangular components, equilibrium when the resultant force is zero, the scalar product for work and projections, and the vector product for torque and cross-product direction using the right-hand rule.
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