Which of the following physical quantities is an example of a vector quantity?
A. Electric current
B. Electric potential
C. Electric field intensity
D. Electric charge
Answer: Option C
Solution (By JKSSB Mock Tests)
A vector quantity possesses both magnitude and a specific spatial direction, and it must obey the laws of vector addition. Electric field intensity is a vector (force per unit charge, having the direction of the force). Electric current has a direction in circuits but adds algebraically like a scalar (violating vector addition). Charge and potential are standard scalars.
Explanation:
Lactometer is a type of hydrometer used to check purity of milk by measuring specific gravity. Adulteration with water lowers density. It doesn't measure temperature or viscosity directly.
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