PHYSICAL QUANTITIES AND MEASUREMENT MCQs

1. What is the length of the path traveled by light in vacuum defined as?

The length of the path traveled by light in vacuum in 1/299 792 458 of an hour

The length of the path traveled by light in vacuum in 1/299 792 458 of a minute

The length of the path traveled by light in vacuum in 1/299 792 458 of a day

The length of the path traveled by light in vacuum in 1/299 792 458 of a second

2. What is the SI unit of mass?

Gram

Pound

Kilogram

Ounce

3. What is the kilogram defined as?

The mass of a copper standard

The mass of a silver standard

The mass of a gold standard

The mass of a platinum-iridium standard

4. What is a physical balance used for?

Measuring mass

Measuring length

Measuring volume

Measuring weight

5. How does a physical balance work?

It uses the principle of levers

It uses the principle of moments

It uses the principle of gravity

It uses the principle of buoyancy

6. What is an electronic balance?

A digital mass meter

A mechanical balance

An analogue balance

A stopwatch

7. What is the standard of time defined as?

The frequency of the cesium-133 atom

The period of vibration of radiation from the cesium atom

The rotation of the Earth

The mean solar day for the year 1900

8. What are the two types of stopwatches?

Physical and electronic

Mechanical and digital

Mechanical and electronic

Analog and digital

9. What is human reaction time?

The time it takes for a person to react to an event

The time it takes for a person to reset a stopwatch

The time it takes for a person to start a stopwatch

The time it takes for a person to stop a stopwatch

10. What is scientific notation?

A method of writing very large numbers

A method of writing very small numbers

A method of writing complex numbers

A method of writing irrational numbers