Units and Measurements MCQs 2026

50 questions with detailed answers · 20 from past papers · 5 quiz batches available

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Page 1 of 1Questions 1–10 of 50

Q1hard
The dimensional formula of force is
1. A[ML^2T^-2]
2. B[MLT^-2]
3. C[ML^-1T^-2]
4. D[MLT^-1]
💡 Explanation:
Force = mass x acceleration, giving dimensions of mass, length, and time^-2.
Q2Past Paper · PPSC/FPSC/NTSeasy
The SI unit of electric charge is
1. ACoulomb
2. BAmpere
3. CFarad
4. DOhm
💡 Explanation:
The coulomb is the SI unit of electric charge, equal to one ampere-second.
Q3Past Paper · PPSC/FPSC/NTSeasy
The SI unit of length is
1. AFoot
2. BMetre
3. CYard
4. DInch
💡 Explanation:
The metre is the SI base unit of length.
Q4Past Paper · PPSC/FPSC/NTSeasy
The SI unit of mass is
1. AGram
2. BPound
3. COunce
4. DKilogram
💡 Explanation:
The kilogram is the SI base unit of mass.
Q5Past Paper · PPSC/FPSC/NTSeasy
The SI unit of time is
1. ASecond
2. BMinute
3. CHour
4. DDay
💡 Explanation:
The second is the SI base unit of time.
Q6Past Paper · PPSC/FPSC/NTSeasy
The SI unit of temperature is
1. ACelsius
2. BFahrenheit
3. CKelvin
4. DRankine
💡 Explanation:
The kelvin is the SI base unit of thermodynamic temperature.
Q7Past Paper · PPSC/FPSC/NTSeasy
The SI unit of electric current is
1. AAmpere
2. BVolt
3. COhm
4. DWatt
💡 Explanation:
The ampere is the SI base unit of electric current.
Q8Past Paper · PPSC/FPSC/NTSeasy
The SI unit of luminous intensity is
1. ALumen
2. BCandela
3. CLux
4. DWatt
💡 Explanation:
The candela is the SI base unit of luminous intensity.
Q9Past Paper · PPSC/FPSC/NTSeasy
The SI unit of amount of substance is
1. AMolecule
2. BMolarity
3. CLitre
4. DMole
💡 Explanation:
The mole is the SI base unit for amount of substance.
Q10Past Paper · PPSC/FPSC/NTSeasy
The SI unit of force is
1. ADyne
2. BPascal
3. CNewton
4. DJoule
💡 Explanation:
The newton is the SI derived unit of force, defined as kg.m/s^2.
Q11Past Paper · PPSC/FPSC/NTSeasy
The SI unit of work and energy is
1. AWatt
2. BJoule
3. CNewton
4. DPascal
💡 Explanation:
The joule is the SI derived unit of work and energy.
Q12Past Paper · PPSC/FPSC/NTSeasy
The SI unit of power is
1. AWatt
2. BJoule
3. CNewton
4. DVolt
💡 Explanation:
The watt equals one joule per second and is the SI unit of power.
Q13Past Paper · PPSC/FPSC/NTSeasy
The SI unit of electrical resistance is
1. AFarad
2. BHenry
3. COhm
4. DSiemens
💡 Explanation:
The ohm is the SI unit of electrical resistance.
Q14Past Paper · PPSC/FPSC/NTSeasy
The SI unit of pressure is
1. ANewton
2. BJoule
3. CBar
4. DPascal
💡 Explanation:
The pascal is the SI derived unit of pressure, equal to one newton per square metre.
Q15Past Paper · PPSC/FPSC/NTSmedium
The SI unit of magnetic flux is
1. AWeber
2. BTesla
3. CHenry
4. DGauss
💡 Explanation:
The weber is the SI unit of magnetic flux.
Q16Past Paper · PPSC/FPSC/NTSmedium
The SI unit of magnetic flux density is
1. AWeber
2. BTesla
3. CGauss
4. DHenry
💡 Explanation:
The tesla is the SI unit of magnetic flux density; gauss is the older CGS unit.
Q17Past Paper · PPSC/FPSC/NTSmedium
The SI unit of inductance is
1. AFarad
2. BWeber
3. CTesla
4. DHenry
💡 Explanation:
The henry is the SI unit of electrical inductance.
Q18medium
The number of fundamental base quantities in the SI system is
1. A5
2. B6
3. C7
4. D8
💡 Explanation:
SI defines seven base quantities: length, mass, time, current, temperature, amount of substance, and luminous intensity.
Q19hard
The dimensional formula of work and energy is
1. A[ML^2T^-2]
2. B[MLT^-2]
3. C[ML^2T^-3]
4. D[ML^-1T^-2]
💡 Explanation:
Work equals force times distance, giving mass, length squared, and time^-2.
Q20hard
The dimensional formula of power is
1. A[ML^2T^-2]
2. B[MLT^-2]
3. C[ML^-1T^-2]
4. D[ML^2T^-3]
💡 Explanation:
Power is work done per unit time, so its dimension is energy dimension divided by time.
Q21hard
The dimensional formula of pressure is
1. A[MLT^-2]
2. B[ML^2T^-2]
3. C[ML^-1T^-2]
4. D[ML^-3]
💡 Explanation:
Pressure is force per unit area, giving mass, length^-1, and time^-2.
Q22medium
The dimensional formula of velocity is
1. A[LT^-1]
2. B[LT^-2]
3. C[MLT^-1]
4. D[L^2T^-1]
💡 Explanation:
Velocity is displacement per unit time, giving length divided by time.
Q23medium
The dimensional formula of acceleration is
1. A[LT^-1]
2. B[LT^-2]
3. C[MLT^-2]
4. D[L^2T^-2]
💡 Explanation:
Acceleration is the rate of change of velocity, giving length divided by time squared.
Q24medium
The dimensional formula of density is
1. A[ML^3]
2. B[ML^-1]
3. C[MLT^-3]
4. D[ML^-3]
💡 Explanation:
Density is mass per unit volume, giving mass divided by length cubed.
Q25medium
An instrument commonly used to measure small lengths, such as the diameter of a rod, with a sliding scale is the
1. AMetre rule
2. BMeasuring tape
3. CVernier caliper
4. DProtractor
💡 Explanation:
A vernier caliper uses a main scale and a sliding vernier scale to measure small lengths precisely.
Q26medium
The least count of a common vernier caliper with 10 vernier divisions is typically
1. A0.01 cm
2. B0.1 cm
3. C0.001 cm
4. D1 cm
💡 Explanation:
Least count equals one main scale division divided by the number of vernier divisions, usually 0.01 cm.
Q27medium
An instrument more precise than the vernier caliper, used to measure the diameter of a thin wire, is the
1. AVernier caliper
2. BScrew gauge
3. CMetre rule
4. DSpring balance
💡 Explanation:
The screw gauge (micrometer) has a smaller least count than the vernier caliper.
Q28medium
The typical least count of a screw gauge is about
1. A0.1 cm
2. B0.01 cm
3. C1 cm
4. D0.001 cm
💡 Explanation:
A screw gauge commonly has a least count of about 0.001 cm (0.01 mm).
Q29medium
The unit used to express large astronomical distances, defined as the distance light travels in one year, is the
1. AParsec
2. BAngstrom
3. CLight year
4. DAstronomical unit
💡 Explanation:
A light year is the distance light travels in vacuum in one year.
Q30medium
One angstrom, commonly used to measure atomic and molecular sizes, equals
1. A10^-9 metre
2. B10^-10 metre
3. C10^-8 metre
4. D10^-12 metre
💡 Explanation:
One angstrom equals 10^-10 metre.
Q31easy
One micron is equal to
1. A10^-6 metre
2. B10^-9 metre
3. C10^-3 metre
4. D10^-12 metre
💡 Explanation:
A micron (micrometre) equals 10^-6 metre.
Q32easy
One nanometre is equal to
1. A10^-6 metre
2. B10^-12 metre
3. C10^-10 metre
4. D10^-9 metre
💡 Explanation:
A nanometre equals 10^-9 metre.
Q33easy
The metric prefix "kilo" represents a factor of
1. A10^2
2. B10^-3
3. C10^3
4. D10^6
💡 Explanation:
Kilo denotes a multiplication factor of one thousand (10^3).
Q34easy
The metric prefix "milli" represents a factor of
1. A10^-3
2. B10^-6
3. C10^3
4. D10^-2
💡 Explanation:
Milli denotes a factor of one thousandth (10^-3).
Q35easy
The metric prefix "mega" represents a factor of
1. A10^3
2. B10^6
3. C10^9
4. D10^-6
💡 Explanation:
Mega denotes a factor of one million (10^6).
Q36easy
The metric prefix "micro" represents a factor of
1. A10^-3
2. B10^-9
3. C10^6
4. D10^-6
💡 Explanation:
Micro denotes a factor of one millionth (10^-6).
Q37easy
The metric prefix "giga" represents a factor of
1. A10^6
2. B10^12
3. C10^9
4. D10^-9
💡 Explanation:
Giga denotes a factor of one billion (10^9).
Q38easy
The metric prefix "nano" represents a factor of
1. A10^-9
2. B10^-6
3. C10^-12
4. D10^9
💡 Explanation:
Nano denotes a factor of one billionth (10^-9).
Q39medium
The metric prefix "tera" represents a factor of
1. A10^9
2. B10^12
3. C10^15
4. D10^6
💡 Explanation:
Tera denotes a factor of one trillion (10^12).
Q40medium
The metric prefix "pico" represents a factor of
1. A10^-9
2. B10^-6
3. C10^-3
4. D10^-12
💡 Explanation:
Pico denotes a factor of one trillionth (10^-12).
Q41easy
The CGS unit of force is the
1. ANewton
2. BJoule
3. CDyne
4. DErg
💡 Explanation:
The dyne is the unit of force in the CGS system.
Q42easy
The CGS unit of energy is the
1. ADyne
2. BErg
3. CJoule
4. DCalorie
💡 Explanation:
The erg is the unit of energy in the CGS system.
Q43medium
One newton is equal to
1. A10^5 dynes
2. B10^3 dynes
3. C10^7 dynes
4. D10^2 dynes
💡 Explanation:
Since 1 N = 1 kg.m/s^2 and 1 dyne = 1 g.cm/s^2, one newton equals 10^5 dynes.
Q44medium
One joule is equal to
1. A10^5 ergs
2. B10^3 ergs
3. C10^7 ergs
4. D10^9 ergs
💡 Explanation:
Since 1 J = 1 kg.m^2/s^2 and 1 erg = 1 g.cm^2/s^2, one joule equals 10^7 ergs.
Q45Past Paper · PPSC/FPSC/NTSeasy
Absolute zero temperature corresponds to approximately
1. A0 degrees Celsius
2. B100 degrees Celsius
3. C-100 degrees Celsius
4. D-273.15 degrees Celsius
💡 Explanation:
Absolute zero, the lowest possible temperature, is -273.15 degrees Celsius.
Q46easy
On the Kelvin scale, absolute zero is defined as
1. A0 K
2. B100 K
3. C273 K
4. D-273 K
💡 Explanation:
The Kelvin scale is defined so that absolute zero is exactly 0 K.
Q47medium
In significant figures, all non-zero digits and zeros between non-zero digits are considered
1. ANot significant
2. BSignificant
3. CApproximate only
4. DIrrelevant
💡 Explanation:
Non-zero digits and zeros trapped between them always count as significant figures.
Q48Past Paper · PPSC/FPSC/NTSeasy
The SI unit of electric potential is
1. AAmpere
2. BVolt
3. COhm
4. DWatt
💡 Explanation:
The volt is the SI unit of electric potential difference.
Q49Past Paper · PPSC/FPSC/NTSeasy
The SI unit of frequency is
1. AWatt
2. BVolt
3. CHertz
4. DTesla
💡 Explanation:
The hertz measures the number of cycles per second.
Q50Past Paper · PPSC/FPSC/NTSeasy
The SI unit of capacitance is
1. AHenry
2. BWeber
3. CTesla
4. DFarad
💡 Explanation:
The farad is the SI unit of electrical capacitance.

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Units and Measurements MCQs 2026

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