Which of the following lists contains scalar quantities only?
Correct answer: B. Mass, volume, electrical potential, kinetic energy
- A. Mass, acceleration, temperature, kinetic energy
- B. Mass, volume, electrical potential, kinetic energy
- C. Acceleration, temperature, volume, electric charge
- D. Momentum, electric intensity, density, magnetic flux.
Explanation
A scalar quantity contains only magnitude and no direction, making options B the correct answer. Mass, volume, and electrical potential are all examples of scalar quantities as they can be fully described by their magnitude alone. Kinetic energy is also a scalar quantity due to the mathematical relationship between mass and velocity. Options A, C, and D include vector quantities, such as acceleration, momentum, and electric intensity, which have both magnitude and direction, making them incorrect choices for this question.
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About Physical Quantities and Units
Physical quantities combine a numerical value with a unit, and are expressed using SI base units or derived units such as newtons, joules and pascals. The topic covers prefixes, unit conversion, dimensional analysis, significant figures and measurement uncertainty, while distinguishing scalar quantities from vectors where direction matters.
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