Quiz on Physical Quantities, Scalars, Vectors, and SI Units

Which of the following best describes a scalar quantity?

• A quantity with both magnitude and direction
• A quantity with only magnitude
• A quantity that can be negative
• A quantity that varies with time

Which of the following is an example of a vector quantity?

• Temperature
• Speed
• Force
• Mass

What is the SI unit for measuring length?

• Kilogram
• Meter
• Second
• Ampere

Which of the following statements is true regarding scalar and vector quantities?

• All physical quantities are either scalar or vector
• Scalars can be represented as arrows
• Vectors have no units
• Scalars can be added geometrically

What is the SI unit of energy?

• Joule
• Newton
• Watt
• Pascal

Which of the following quantities is NOT a fundamental physical quantity?

• Length
• Time
• Energy
• Electric current

When two vectors are added, what is the nature of the result?

• Always a scalar
• Always a vector
• Can be either a scalar or a vector
• Neither a scalar nor a vector

Which of the following is the correct SI unit for pressure?

• N/m²
• kg/m³
• J/m³
• W/m²

The dimension of acceleration in terms of mass (M), length (L), and time (T) is:

• MLT⁻²
• ML²T⁻²
• MLT²
• MLT⁻¹

Which of the following is a base unit in the SI system?

• Newton
• Joule
• Mole
• Pascal