If we change unit of a physical quantity then (A) its dimension changes. (B) its dimension remai

Step 1: We know that a physical quantity is represented as the product of a numerical value and

If we change unit of a physical quantity then (A) its...

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Key Concepts

Unit Conversion

Unit conversion is the process of changing the units of a physical quantity while preserving its dimensions and inherent value. This process adjusts the magnitude according to a conversion factor without altering the physical significance of the measurement.

Magnitude

Magnitude is the numerical part of a measurement that quantifies how much of a physical quantity is present. When the unit is changed, the numerical magnitude also changes because it depends on the scale set by the unit.

Units

Units are standardized measurements used to express the magnitude of physical quantities. They provide a reference that defines how the numerical value relates to the physical quantity and can be changed without affecting the underlying phenomenon.

Physical Quantity

A physical quantity is an attribute of a phenomenon or object that can be measured. It is expressed as a combination of a numerical value (magnitude) and a unit, allowing for consistent and comparable measurements.

Dimensions

Dimensions refer to the qualitative nature of a physical quantity, such as length, mass, or time. They remain constant even if the units used to measure the quantity are changed, as dimensions provide a fundamental description independent of the measurement system.

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