Physics Quiz on Measurements and Vectors

Which of the following is a quantitative observation?

• Water boils at 100°C

• Ice is cold

• Sugar tastes sweet

• Fire is hot

Estimation of a physical quantity means:

• Guessing randomly

• Using past experience and reasoning

• Measuring exactly

• Memorizing data

The unit of force in SI base units is:

• kg

• kg·m/s²

• N/m²

• kg·m²/s

Dimensions of velocity are:

• [LT]

• [L/T]

• [LT⁻¹]

• [MLT]

Which of the following is dimensionless but has a variable magnitude?

• Velocity

• Force

• Strain

• Energy

Which statement is true about precision?

• It refers to closeness to the true value

• It means eliminating errors

• It refers to consistency in repeated measurements

• It is not measurable

What is the dimension of Planck's constant hhh?

• [ML²T⁻²]

• [MLT]

• [ML²T⁻¹]

• [M⁻¹L³T⁻²]

If the volume of a block is 3.5 m³ and density is 800 kg/m³, the mass is:

• 2800 kg

• 2200 kg

• 3200 kg

• 1800 kg

Which physical quantity has unit Coulomb?

• Resistance

• Capacitance

• Electric Charge

• Electric Field

A correct dimensionally consistent formula for speed is:

• v = x·t

• v = x/t

• v = t/x

• v = x·t²