CBSE Class 11 (Science) Units and Measurement — practice questions
120 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 11 (Science) Units and Measurement in the app →As per your syllabus, Table 1.1, the SI system has how many BASE quantities and units?As per your syllabus, the SI unit of LUMINOUS INTENSITY is which?As per your syllabus, the SI unit of AMOUNT OF SUBSTANCE is the mole, and one mole contains exactly how many eAs per your syllabus, the second is defined via the caesium-133 hyperfine transition frequency Δν_Cs, fixed atAs per your syllabus, the metre is defined so that the speed of light in vacuum equals which value?As per your syllabus, the kilogram is now defined via which fundamental constant?As per your syllabus, the kelvin is defined by fixing which constant?As per your syllabus, the unit of PLANE ANGLE in SI is which?As per your syllabus, the unit of SOLID ANGLE in SI is which?As per your syllabus, the SI unit of ELECTRIC CURRENT is the ampere, defined via the elementary charge fixed aAs per your syllabus, 1 LITRE equals which SI volume?As per your syllabus, 1 STANDARD ATMOSPHERIC PRESSURE (atm) equals approximately which value?As per your syllabus, rule, ALL non-zero digits in a measurement are which?As per your syllabus, the number of significant figures in 2.308 cm is which?As per your syllabus, rule, in a number less than 1, the zeros LEFT of the first non-zero digit are which?As per your syllabus, the number of significant figures in 0.007 m² is which?As per your syllabus, in a number WITH a decimal point, TRAILING zeros are which?As per your syllabus, the number of significant figures in 6.320 J is which?As per your syllabus, the number 4 700 m written WITHOUT a decimal has how many significant figures?As per your syllabus, in the form a × 10ᵇ all zeros appearing in the base number a are which?As per your syllabus, the diameter of Earth ≈ 1.28 × 10⁷ m has order of magnitude equal to which value?As per your syllabus, the diameter of a hydrogen atom (≈ 1.06 × 10⁻¹⁰ m) has order of magnitude equal to whichAs per your syllabus, rule, exact integers (like 2 in s = 2πr or n in T = t/n) have how many significant figurAs per your syllabus, the digit 0 conventionally placed to the LEFT of the decimal in numbers < 1 (e.g. 0.1250As per your syllabus, Ex 1.2, 5.74 g of substance in 1.2 cm³ gives a density of which value to correct signifiAs per your syllabus, the sum 436.32 g + 227.2 g + 0.301 g = 663.821 g should be reported as which value?As per your syllabus, the number 2.746 rounded to THREE significant figures is which?As per your syllabus, the number 2.745 rounded to THREE significant figures is which?As per your syllabus, the number 2.735 rounded to THREE significant figures becomes which?As per your syllabus, Ex 1.1, the surface area of a cube of side 7.203 m to appropriate significant figures isAs per your syllabus, Ex 1, the area of a rectangle 16.2 cm × 10.1 cm with each ±0.1 cm uncertainty is approxiAs per your syllabus, the relative error in a measurement of 1.02 g with ±0.01 g uncertainty is approximately As per your syllabus, in 12.9 g − 7.06 g (each to 3 significant figures), the result must be reported as whichAs per your syllabus, in multi-step calculations one should retain how many EXTRA digits in intermediate stepsAs per your syllabus, the dimensional formula of FORCE is which?As per your syllabus, the dimensional formula of ENERGY (joule) is which?As per your syllabus, the dimensional formula of MASS DENSITY is which?As per your syllabus, the dimensional formula of VELOCITY is which?As per your syllabus, two physical quantities can be added or subtracted only if which condition holds?As per your syllabus, Ex 1.4, which formula for kinetic energy is dimensionally INCORRECT?As per your syllabus, a DIMENSIONALLY CORRECT equation is necessarily which?As per your syllabus, Ex 1.5, the period of a simple pendulum T derived from dimensional analysis (l, g, m) giAs per your syllabus, the dimensions of PRESSURE are which?As per your syllabus, ANGLE has which dimensions, since it is the ratio of two lengths (arc/radius)?Measurement compares a quantity against a standard called a:A measurement is reported as a unit together with a:Although physical quantities are many, the units needed are:Units for the fundamental quantities are called:Units built as combinations of base units are called:Base units and derived units together form a:Which system used centimetre, gram and second?Which system used foot, pound and second?Which system used metre, kilogram and second?How many base units does the SI system have?Besides the base units, SI defines how many more units?The SI unit of plane angle is the:The SI unit of mass carries the symbol:Very large distances such as to a planet are measured by:Viewing a pencil with each eye in turn shows its position:The distance between the two points of observation is called the:In the pencil example, the basis is the distance between the:To find a planet's distance, it is observed from positions numbering:A unit used for atomic sized lengths is the:The reference standard used in measurement is chosen and:Which of these is a base quantity rather than a derived one?The unit of solid angle is defined using area over the radius:Units of quantities formed by combining base units are called what?A complete set of base units and derived units together is known as what?In the CGS system, which was the base unit of mass?Which unit is used for solid angle in SI?Solid angle is the intercepted area on a sphere divided by what?The metre is now defined by fixing the value of which constant?Since 2019, the kilogram rests on an exact value of which constant?The SI second is based on a hyperfine transition in which atom?Which constant, given an exact value in coulombs, now defines the ampere?When the mole is used as a unit, what must always be specified?At which CGPM were the 2018 SI redefinitions adopted?Significant figures are the reliable digits plus which digit?How many significant figures does 0.04050 kg have?A rod is measured as 30.07 m. How many significant figures?By the rule for whole numbers, how many significant figures does 8100 kg have?In scientific notation, how many significant figures does 6.400 x 10^3 g carry?Rewriting 3.20 m as 320 cm does what to its significant figures?In 0.75, the zero written before the decimal point is what?A sheet is 3.6 m by 2.135 m. Its area to correct significant figures is?Masses 12.11 g, 3.2 g and 0.456 g are added. The reported sum is?How should 5.63 g minus 5.61 g be reported?Under the even-odd rule, 4.865 rounded to three significant figures is?Round 3.475 to two decimal places using the even-odd convention.In a multi-step calculation, intermediate values should keep how many digits?The relative error of a value given to n significant figures also depends on what?The precision of a measurement depends mainly on what?The dimensions of a physical quantity are best described as what?Which symbol denotes the dimension of electric current?Adding only quantities of the same dimensions is called the principle of what?The argument of sin, log or exp in a physics formula must be what?What are the dimensions of refractive index?An equation whose terms have unequal dimensions must be what?Which task can dimensional analysis NOT do?When computing derived quantities, how are units treated?What is one advantage of a dimensional check over a units check?What is the dimensional formula of linear momentum?From F = Gm1m2/r², the dimensions of G are?Since E = hν, Planck's constant h has which dimensions?Surface tension is force per unit length. Its dimensional formula is?If speed v = At + B/t, what are the dimensions of B?Wave speed v on a string depends on tension F and mass per length μ. Then v is proportional to?Which organisation coordinates the SI?In which year were the newest SI prefixes adopted?Which SI prefix is NOT an integer power of 1000?A millionth of a metre is correctly called what?Which coherent SI unit has a prefix in its name?J/K is the coherent SI unit of heat capacity and of which quantity?How is a unit named after a person, like newton, written mid-sentence?How many nations signed the Metre Convention in 1875?Which CGPM adopted the International System of Units in 1960?In which year did the mole become the seventh SI base unit?Which unit joined the MKS system to form the MKSA system?Before 2019, which was the last physical artefact defining an SI unit?The electronvolt is a non-SI unit of which quantity?