Chapter 1: Physical Quantities and Measurement MCQs

What is Physical Quantities and Measurement?

Physical Quantities and Measurement is a fundamental chapter in Physics that introduces the basic concepts required to understand and quantify the physical world. This unit covers the different types of physical quantities, such as length, mass, time, and temperature, and explores the units used to measure them. Students learn about the importance of the International System of Units (SI), as well as the tools and techniques used in measuring various physical quantities accurately. The chapter also delves into significant figures, scientific notation, and the precision and accuracy of measurements.

Key Topics in Physical Quantities and Measurement:

Physical Quantities: Understanding the fundamental and derived quantities in Physics.
Measurement Units: Exploring SI units and their significance in standardizing measurements.
Measuring Instruments: Learning about tools like rulers, balances, stopwatches, and thermometers for accurate measurement.
Significant Figures: Applying rules for determining the precision of measurements.
Scientific Notation: Using scientific notation to express large and small quantities efficiently.
Precision and Accuracy: Understanding the concepts of precision and accuracy in the context of measurements.

Benefits of Studying Physical Quantities and Measurement:

Foundation for Physics: Establishes the groundwork for understanding more complex topics in Physics.
Critical Skills: Enhances skills in precise measurement and data analysis, essential for scientific studies.
Academic Success: Prepares students for advanced studies in Physics and related fields by mastering basic measurement concepts.

This chapter is crucial for students to grasp the essential principles of measurement, providing the knowledge necessary to excel in further Physics studies. Whether preparing for exams or building a strong foundation in Physics, understanding physical quantities and measurement is key to success.

Which of the following is a fundamental quantity?
- a) Speed
- b) Volume
- c) Time
- d) Force
- Answer: c) Time
Which SI unit is used to measure mass?
- a) Kilogram
- b) Meter
- c) Second
- d) Newton
- Answer: a) Kilogram
The SI unit of length is:
- a) Meter
- b) Centimeter
- c) Kilometer
- d) Millimeter
- Answer: a) Meter
Which instrument is used to measure the thickness of a wire?
- a) Vernier Caliper
- b) Micrometer Screw Gauge
- c) Ruler
- d) Balance
- Answer: b) Micrometer Screw Gauge
Which of the following is a derived quantity?
- a) Mass
- b) Length
- c) Area
- d) Time
- Answer: c) Area
One meter is equal to how many centimeters?
- a) 1000 cm
- b) 10 cm
- c) 100 cm
- d) 10000 cm
- Answer: c) 100 cm
The least count of a Vernier Caliper is:
- a) 0.01 mm
- b) 0.1 mm
- c) 0.02 mm
- d) 1 mm
- Answer: c) 0.02 mm
Which of the following is not a unit of time?
- a) Second
- b) Minute
- c) Hour
- d) Joule
- Answer: d) Joule
In Vernier Caliper, the smallest division on the main scale is:
- a) 0.1 cm
- b) 0.01 cm
- c) 0.2 cm
- d) 1 cm
- Answer: a) 0.1 cm
1 liter is equal to:
- a) 1000 cm³
- b) 100 cm³
- c) 10 cm³
- d) 1 cm³
- Answer: a) 1000 cm³
Which of the following is a base unit in the International System of Units (SI)?
- a) Kelvin
- b) Gram
- c) Centimeter
- d) Millisecond
- Answer: a) Kelvin
The SI unit of temperature is:
- a) Celsius
- b) Fahrenheit
- c) Kelvin
- d) Rankine
- Answer: c) Kelvin
Which instrument is used to measure small distances with high accuracy?
- a) Vernier Caliper
- b) Micrometer Screw Gauge
- c) Measuring Tape
- d) Stopwatch
- Answer: b) Micrometer Screw Gauge
What is the SI unit of force?
- a) Newton
- b) Joule
- c) Watt
- d) Pascal
- Answer: a) Newton
Which physical quantity has the unit ‘Pascal’?
- a) Pressure
- b) Force
- c) Energy
- d) Power
- Answer: a) Pressure
Which one of the following is a scalar quantity?
- a) Velocity
- b) Force
- c) Displacement
- d) Temperature
- Answer: d) Temperature
The formula to calculate density is:
- a) Mass × Volume
- b) Mass / Volume
- c) Volume / Mass
- d) Force × Distance
- Answer: b) Mass / Volume
The standard unit of time is:
- a) Minute
- b) Hour
- c) Second
- d) Day
- Answer: c) Second
How many seconds are there in one hour?
- a) 600
- b) 1800
- c) 3600
- d) 7200
- Answer: c) 3600
Which of the following represents a derived unit?
- a) Meter
- b) Kilogram
- c) Second
- d) Joule
- Answer: d) Joule
What is the least count of a standard laboratory stopwatch?
- a) 0.1 second
- b) 0.01 second
- c) 0.001 second
- d) 1 second
- Answer: a) 0.1 second
What is the unit of electric current in SI?
- a) Volt
- b) Ohm
- c) Ampere
- d) Coulomb
- Answer: c) Ampere
Which one of the following is a vector quantity?
- a) Time
- b) Volume
- c) Displacement
- d) Mass
- Answer: c) Displacement
The unit ‘Joule’ is associated with which physical quantity?
- a) Power
- b) Work
- c) Pressure
- d) Force
- Answer: b) Work
The accuracy of a measurement refers to:
- a) How close the measured value is to the true value
- b) The difference between two measurements
- c) The smallest measurable quantity
- d) How reproducible the measurements are
- Answer: a) How close the measured value is to the true value
What is the symbol for the SI unit of electric charge?
- a) V
- b) C
- c) A
- d) Ω
- Answer: b) C
The SI unit of frequency is:
- a) Hertz
- b) Joule
- c) Watt
- d) Newton
- Answer: a) Hertz
The correct formula to calculate speed is:
- a) Distance × Time
- b) Distance / Time
- c) Time / Distance
- d) Force / Distance
- Answer: b) Distance / Time
Which one of the following quantities has the unit ‘Watt’?
- a) Work
- b) Power
- c) Force
- d) Pressure
- Answer: b) Power
The mass of an object is 5 kg. What is its weight on Earth (g = 9.8 m/s²)?
- a) 9.8 N
- b) 49 N
- c) 5 N
- d) 98 N
- Answer: d) 98 N
Which one of the following is not a base quantity?
- a) Time
- b) Temperature
- c) Speed
- d) Mass
- Answer: c) Speed
What is the standard unit of pressure in the International System (SI)?
- a) Pascal
- b) Newton
- c) Joule
- d) Watt
- Answer: a) Pascal
Which one of the following is a unit of volume?
- a) Square meter
- b) Cubic meter
- c) Newton
- d) Joule
- Answer: b) Cubic meter
The correct unit of acceleration in the SI system is:
- a) m/s
- b) m/s²
- c) km/h
- d) m²/s
- Answer: b) m/s²
Which of the following represents a correct pair of physical quantity and unit?
- a) Work – Pascal
- b) Power – Joule
- c) Energy – Watt
- d) Force – Newton
- Answer: d) Force – Newton
One millimeter is equal to:
- a) 0.1 cm
- b) 0.01 cm
- c) 0.001 cm
- d) 1 cm
- Answer: b) 0.01 cm
The basic unit of length in the metric system is the:
- a) Yard
- b) Foot
- c) Meter
- d) Inch
- Answer: c) Meter
The SI unit of energy is:
- a) Watt
- b) Joule
- c) Newton
- d) Volt
- Answer: b) Joule
The time taken for a pendulum to complete one oscillation is called:
- a) Frequency
- b) Period
- c) Wavelength
- d) Amplitude
- Answer: b) Period
The SI unit for measuring temperature is:
- a) Celsius
- b) Kelvin
- c) Fahrenheit
- d) Degree
- Answer: b) Kelvin
What is the unit of pressure in the International System of Units (SI)?
- a) Joule
- b) Pascal
- c) Newton
- d) Meter
- Answer: b) Pascal
What is the SI unit of density?
- a) kg/m²
- b) kg/m³
- c) g/cm³
- d) g/m³
- Answer: b) kg/m³
Which of the following is an example of a vector quantity?
- a) Speed
- b) Mass
- c) Volume
- d) Velocity
- Answer: d) Velocity
Which instrument is used to measure mass?
- a) Vernier Caliper
- b) Micrometer Screw Gauge
- c) Stopwatch
- d) Balance
- Answer: d) Balance
Which unit is used to measure electric resistance?
- a) Volt
- b) Coulomb
- c) Ohm
- d) Watt
- Answer: c) Ohm
Which one of the following is a scalar quantity?
- a) Force
- b) Velocity
- c) Acceleration
- d) Temperature
- Answer: d) Temperature
Which quantity is represented by the unit ‘Hertz’?
- a) Work
- b) Power
- c) Frequency
- d) Energy
- Answer: c) Frequency
The smallest division on a meter scale is:
- a) 1 cm
- b) 0.1 cm
- c) 1 mm
- d) 0.1 mm
- Answer: c) 1 mm
Which one of the following is a derived quantity?
- a) Time
- b) Mass
- c) Length
- d) Speed
- Answer: d) Speed
Which one of the following is a fundamental quantity?
- a) Area
- b) Volume
- c) Time
- d) Speed
- Answer: c) Time
The standard unit for measuring electric charge is:
- a) Volt
- b) Ohm
- c) Ampere
- d) Coulomb
- Answer: d) Coulomb
The standard unit for measuring electric current is:
- a) Volt
- b) Ohm
- c) Ampere
- d) Coulomb
- Answer: c) Ampere
1 kilogram is equal to how many grams?
- a) 10 grams
- b) 100 grams
- c) 1000 grams
- d) 10000 grams
- Answer: c) 1000 grams
What is the SI unit of power?
- a) Newton
- b) Joule
- c) Watt
- d) Pascal
- Answer: c) Watt
The period of a pendulum depends on:
- a) Length of the string
- b) Mass of the bob
- c) Amplitude of swing
- d) None of these
- Answer: a) Length of the string
1 kilometer is equal to how many meters?
- a) 1000 meters
- b) 100 meters
- c) 10 meters
- d) 1 meter
- Answer: a) 1000 meters
What is the least count of a typical laboratory meter rule?
- a) 1 cm
- b) 1 mm
- c) 1 μm
- d) 1 nm
- Answer: b) 1 mm
In the SI system, the unit for measuring luminous intensity is:
- a) Candela
- b) Lumen
- c) Lux
- d) Watt
- Answer: a) Candela
The SI unit for measuring angles is:
- a) Radian
- b) Degree
- c) Revolution
- d) Steradian
- Answer: a) Radian
What is the correct symbol for microsecond?
- a) ms
- b) μs
- c) ns
- d) ps
- Answer: b) μs
What is the SI unit of luminous flux?
- a) Candela
- b) Lumen
- c) Lux
- d) Watt
- Answer: b) Lumen
What is the correct symbol for nanometer?
- a) nm
- b) mm
- c) μm
- d) pm
- Answer: a) nm
Which one of the following is not a base unit in the SI system?
- a) Kilogram
- b) Meter
- c) Second
- d) Liter
- Answer: d) Liter
Which one of the following represents a unit of frequency?
- a) Watt
- b) Joule
- c) Hertz
- d) Newton
- Answer: c) Hertz
1 millisecond is equal to how many seconds?
- a) 0.001 second
- b) 0.01 second
- c) 0.1 second
- d) 1 second
- Answer: a) 0.001 second
Which unit is used to measure solid angle?
- a) Radian
- b) Steradian
- c) Degree
- d) Candela
- Answer: b) Steradian
Which physical quantity is represented by the unit ‘Newton’?
- a) Energy
- b) Force
- c) Power
- d) Pressure
- Answer: b) Force
Which one of the following is a vector quantity?
- a) Speed
- b) Mass
- c) Volume
- d) Acceleration
- Answer: d) Acceleration
Which one of the following is a derived quantity?
- a) Length
- b) Mass
- c) Area
- d) Time
- Answer: c) Area
Which physical quantity is measured in Joules?
- a) Work
- b) Power
- c) Force
- d) Pressure
- Answer: a) Work
Which instrument is used to measure electric current?
- a) Ammeter
- b) Voltmeter
- c) Ohmmeter
- d) Galvanometer
- Answer: a) Ammeter
The basic unit of time in the SI system is the:
- a) Minute
- b) Hour
- c) Second
- d) Day
- Answer: c) Second
The instrument used to measure atmospheric pressure is:
- a) Barometer
- b) Thermometer
- c) Hygrometer
- d) Anemometer
- Answer: a) Barometer
The SI unit of magnetic flux density is:
- a) Tesla
- b) Gauss
- c) Weber
- d) Maxwell
- Answer: a) Tesla
The symbol for the SI unit of force is:
- a) N
- b) F
- c) J
- d) W
- Answer: a) N
The SI unit of work is:
- a) Joule
- b) Watt
- c) Newton
- d) Pascal
- Answer: a) Joule
What is the formula for calculating area?
- a) Length × Width
- b) Length + Width
- c) Length / Width
- d) Length × Height
- Answer: a) Length × Width
What is the SI unit for luminous intensity?
- a) Lumen
- b) Candela
- c) Lux
- d) Watt
- Answer: b) Candela
The unit of electric potential is:
- a) Ohm
- b) Watt
- c) Volt
- d) Ampere
- Answer: c) Volt
What is the SI unit of energy?
- a) Joule
- b) Newton
- c) Watt
- d) Volt
- Answer: a) Joule
Which one of the following is a scalar quantity?
- a) Force
- b) Velocity
- c) Speed
- d) Displacement
- Answer: c) Speed
Which physical quantity has the unit ‘Newton’?
- a) Force
- b) Work
- c) Power
- d) Energy
- Answer: a) Force
Which of the following quantities has the unit ‘Pascal’?
- a) Pressure
- b) Force
- c) Energy
- d) Power
- Answer: a) Pressure
Which instrument is used to measure temperature?
- a) Barometer
- b) Thermometer
- c) Hygrometer
- d) Anemometer
- Answer: b) Thermometer
What is the unit of electric resistance in the SI system?
- a) Volt
- b) Coulomb
- c) Ohm
- d) Watt
- Answer: c) Ohm
What is the correct formula to calculate speed?
- a) Distance × Time
- b) Distance / Time
- c) Time / Distance
- d) Force / Distance
- Answer: b) Distance / Time
The unit of luminous intensity in the SI system is:
- a) Candela
- b) Lumen
- c) Lux
- d) Watt
- Answer: a) Candela
The formula for calculating density is:
- a) Mass / Volume
- b) Mass × Volume
- c) Volume / Mass
- d) Force × Distance
- Answer: a) Mass / Volume
Which unit is used to measure force?
- a) Newton
- b) Joule
- c) Watt
- d) Pascal
- Answer: a) Newton
Which of the following is a unit of energy?
- a) Joule
- b) Watt
- c) Newton
- d) Pascal
- Answer: a) Joule
The SI unit of length is:
- a) Meter
- b) Centimeter
- c) Kilometer
- d) Millimeter
- Answer: a) Meter
What is the SI unit for mass?
- a) Kilogram
- b) Gram
- c) Milligram
- d) Tonne
- Answer: a) Kilogram
Which unit is used to measure electric current?
- a) Volt
- b) Ohm
- c) Ampere
- d) Coulomb
- Answer: c) Ampere
Which unit is used to measure frequency?
- a) Hertz
- b) Joule
- c) Watt
- d) Newton
- Answer: a) Hertz
Which of the following is a unit of power?
- a) Newton
- b) Joule
- c) Watt
- d) Pascal
- Answer: c) Watt
Which unit is used to measure solid angle?
- a) Radian
- b) Steradian
- c) Degree
- d) Candela
- Answer: b) Steradian
Which instrument is used to measure time intervals?
- a) Stopwatch
- b) Barometer
- c) Thermometer
- d) Anemometer
- Answer: a) Stopwatch
What is the correct formula to calculate area?
- a) Length × Width
- b) Length + Width
- c) Length / Width
- d) Length × Height
- Answer: a) Length × Width
Which of the following quantities has the unit ‘Hertz’?
- a) Work
- b) Power
- c) Frequency
- d) Energy
- Answer: c) Frequency

100. What is the unit of pressure in the International System of Units (SI)?

-a) Joule
– b) Pascal
– c) Newton
– d) Meter

Answer: b) Pascal