General Questions on Physical Quantities and Units

• Which among the following is the international system of units?

Answer: S.I.

• To measure any physical quantity a …….. is required.

Answer: Unit

• Physical quantity = Numerical value x ……….

Answer: Standard unit

• The unit of which physical quantity is the same in all the systems?

Answer: Time

• Physical quantity is that quantity which:

Answer: can be measured

• The SI unit of length is:

Answer: Meter

• The SI unit of mass is:

Answer: Kilogram

• The SI unit of temperature is:

Answer: Kelvin

• Time is measured using a

Answer: Stopwatch

• A measuring cylinder is mainly used to measure:

Answer: Liquid volume

• Which quantity can be measured using a balance?

Answer: Mass

• Weight is measured using a

Answer: Spring balance

• Space occupied by an object is:

Answer: volume

• The SI unit of density is Kg m^-3

Answer: True

• Mass per unit volume is:

Answer: density

• Density is …………. proportional to mass, for a fixed volume.

Answer: directly

• Density is ………….. proportional to volume, for a fixed mass.

Answer: inversely

Measurement of Length

• Which unit is suitable for measuring the height of a classroom?

Answer: Meter

• Which unit is suitable for measuring the distance between two cities?

Answer: Kilometre

• In decreasing magnitude which of the following is correct:

Answer: Km, m, cm, mm

• Arrange the following in increasing magnitude, 1 cm,1 mm,1 Km,1 m;

Answer: 1 mm,1 cm,1 m,1 Km

• 1 cm = …….. mm

Answer: 10

• 1 dm = …….. m

Answer: 0.1

• 1Km = ……..  m

Answer: 1000

• 1 meter = …….. centimetre

Answer: 100

• 5 kilometres = …….. metre

Answer: 5000

• 15 centimetres = ……..

Answer: 150 mm

Measurement of Area

• 1 m²= …….

Answer: 10⁶ mm²

• 1 m² = …….

Answer: 10⁴ cm²

• 1cm²= ……..

Answer: 10^-4 m²

• Larger unit of area is:

Answer: Hectare

• 1km²= …….

Answer: 100 Hectares

• 1 m² = …….

Answer: 10^-6 km²

• SI unit of area is:

Answer: m²

• Area of and irregular shape can be measured using:

Answer: graph paper

• 1 hectare = ……… m²

Answer: 10000

Questions on Mass

• SI unit of mass is:

Answer: kg

• Which is heavier, 10kg cotton or 10 kg iron?

Answer: both are same

• 1 nanogram = …….. gram

Answer: 10^-9

• 1 mg = …….. gram

Answer: 10^-3

• 1 quintal = ……… kg

Answer: 100

• 1 Tonne =  …….. kg

Answer: 1000

• A truck weighs 4 Tonnes. Its weight in kilograms is:

Answer: 4000 Kg

Measurement of Volume

• 1 m³ is equal to:

Answer: 10⁶ cm³

• 1 litre =

Answer: 1000 mL

• 1cm³=

Answer: 1 mL

• 1m³=

Answer: 1000 litre

• 1cm³ of liquid is equal to:

Answer: 1 mL

• SI unit of volume is:

Answer: m³

• If ‘l’ is length of cube, volume is:

Answer: l³

• Volume of book of length 20cm, breadth 10cm and height 5 cm is:

Answer: 1000 cm³

• The volume of a stone which on dropping raises water level from 20.5 mL to 30 mL is?

Answer: 9.5 mL

• Volume of an irregular object can be measured using:

Answer: graduated cylinder

• A ……………. is used in laboratory to measure volume of a liquid

Answer: measuring cylinder

• Smaller unit of volume is:

Answer: cc

• A piece of wood and a piece of copper of same mass have same volume

Answer: False

• It is easier to store 100 kg of steel than 100 kg of cotton because:

Answer: cotton has more volume

• How much water can be stored in a tank of length 1.5 m, width 1 m and height 2 m?

Answer: 3 m³

• The volume of a stone which on dropping raises water level from 20 mL to 35 mL is?

Answer: 15 mL

• Volume of 20 litre of water can be stored in:

Answer: bucket

• Volume of 150 ml of water can be stored in:

Answer: coffee mug

Measurement of Density

• Unit of density is:

Answer: kg m^-3

• The density of a 5kg metal lump of volume 1.25 m³ is

Answer: 4 kg m^-3

• If 90 cm3 of iron weighs 624 g, its density is

Answer: 6.9 kg m^-3

• Mass of a piece of wood is 150 g and volume is 200 cm³ then its density is:

Answer: 0.75g cm^-3

• If the density of wood is 5g cm^-3, what is the mass of 1 cm³?

Answer: 5 g

• If the density of a cube is 10 kg/m³ and mass is 80 kg, what is its length?

Answer: 2 m

• If a cube of length 2m has a mass of 16kg, what is its density?

Answer: 2 kgm^-3

• To determine the density of a solid, we need to know:

Answer: mass and volume

• 10 Kgm^-3 = …….. gcm^-3

Answer: 10^-2

• 15 Kgm^-3 =  …….. gcm^-3

Answer: 15×10^-3

• The density of copper is 8.96 gcm^-3 and that of aluminum is 2.7 gcm^-3, for the same mass, the volume of:

Answer: aluminum will be more

Measurement of Time

• 1 millisecond = …….. microsecond

Answer: 10⁺³

• How many seconds in one hour?

Answer: 3600 s

• How many seconds are there in 1.5 hours?

Answer: 5400

• An online exam is for 1 hour and 45 minutes duration. If students begin the exam at 10:55 AM, what time do they have to submit it?

Answer: 12:40 PM

• An online exam is for 2 hour and 40 minutes duration. If students begin the exam at 9:15 AM, what time do they have to submit it?

Answer: 11:55 AM

• An online exam is for 2 hour and 15 minutes duration. If students begin the exam at 9:15 AM, what time do they have to submit it?

Answer: 11:30 AM

• A train departs from a station at 18:45 hours and arrives at its destination at 02:15 hours the next morning. How long did the journey take?

Answer: 7 hours and 30 minutes

• A train departs from a station at 7:15 PM and arrives at its destination at 4:45 AM the next morning. How long did the journey take?

Answer: 9 hours and 30 minutes

• A train departs from a station at 10:15 AM and arrives at its destination at 11:35 PM. How long did the journey take?

Answer: 13 hours and 20 minutes