# List of Physical Quantities, Symbols and Units

Physical quantities those which can measured. Basically two kinds of physical quantities first is Basic and 2nd is Fundamental. These quantities used to explain the physical laws. Physical quantities classified into 2 types.

## Physical Quantities

Two common examples of physical quantities the weight of an object or the temperature. Both can measured using instruments but we also feel them with our hands by lifting up the objects or touching them.

## Physical Quantities examples

• Mass
• Length
• Time
• Electric current
• Volume
• Area
• Density
• Force
• Energy
• Power
• Electric flux
• Electric potential
• Speed
• Velocity
• Acceleration
• Momentum
• Torque
• Constance or ratio

They have the sole amount, for instance, refractive index(or dielectric index) and the specific gravity. These quantities do not have units.

• Scalars

These characterized by their the magnitude and unit. They may also include direction, but the they are not subject to the laws of vectors. Examples include the charge, distance, mass or speed as well as the current.

• Vectors

Its characterized by magnitude units, direction, and magnitude. They also obey the law of addition in triangles. For instance, force, velocity as well as torque, momentum and displacement.

• Phasors

These characterized by the characteristics of magnitude (amplitude) and their phase. Make sure you follow the law of the triangle. Basic harmonic motion (SHM) waves. AC Voltage and AC current are phasors.

• Tensors

These quantities don’t have any specific direction however they have values that differ in various directions. For instance, the moments of inertia. In anisotropic mediums, even density, refractive index dielectric constant, electrical conductivity, strain, stress and many more transformed into tensors. A physical property that has just one component known as the scalar or a 10sor with zero ranks. Its contains several components, but not less or greater than four components, it’s known as a vector or a Tensor with rank 1. When the component numbers more than four, its called a tensor having greater rank.

• Conversion Factors

Its transform into another one when multiplied by the factor. For instance for a wave, the value y is equal to y sin (y = 0 sin (ot +kx ), the factor k can be a conversion. If k multiplied by displacement or path distance, it produces phases or phase differences.

### Fundamental Quantities

Only three fundamental variables such as mass, length, and time thought to fundamental. With the advancement of science and technology, additional physical measurements added. They are the temperature, electric current as well as luminous intensity and the quantity of the substance.

### Derived Quantities

Physical quantities that derived from fundamental referred to as derived quantities such as acceleration, velocity, force and momentum.

What are the Main Branches Of Physics with Definition

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