Physical Measurement | MCQs

Explanation

The SI unit of pressure is Pascal (represented as Pa) 

in SI base units, one kilogram per meter per second squared (N/m2 or kg m-1s-2)

Definition of Pressure: Pressure can be defined as the force acting per unit area.

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The SI unit of energy/work is the joule (J)

ND23-9-2023

Explanation

A derived quantity is obtained from fundamental quantities (like mass, length, and time).

Force = Mass × Acceleration (Newton’s Second Law), so it is derived from mass, length, and time.

Explanation

Derived quantities are formed from base quantities through mathematical operations.

m² (square meter) is derived from the base unit meter (m) and represents area.

Explanation

 Electromagnetic force is a scalar quantity.

Force is defined as the product of mass and acceleration and force is a vector quantity.

This is the pair in which one physical quantity is scalar and the other is a vector.

Explanation

Electric current is a scalar quantity.

but it possesses magnitude and direction

ND23-9-2023

Explanation

 The temperature scale that is independent of the nature of the working substance is the Thermodynamic scale (Kelvin scale). 

Explanation

Joule is a derived unit of energy, not a base unit.

Kelvin (temperature), Kilogram (mass), and Ampere (current) are SI base units.

Explanation

Length is a base quantity in the International System of Units (SI), with the unit meter (m).

Volume and Area are derived quantities, calculated using base quantities like length.