alleryStart learning →Dimension of energy:
- ML²T⁻²
- MLT⁻²
- Dimensionless
- MLT⁻¹
Show answer and solution
Correct answer: A. ML²T⁻²
Energy = F × distance = MLT⁻² × L = ML²T⁻². SI: kg m² s⁻² = joule.
Indian Navy INET Physics and Measurement — practice questions
Explore 42 free Physics and Measurement questions in Indian Navy INET Physics. Open each question or exercise to read its content, reference answers and available explanation.
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Showing questions 1–30 of 42.
Dimension of energy:Read the answer and worked solution →In Young's modulus determination: Y = (FL)/(A ΔL). Maximum percentage error if F (force) 1%, L (length) 2%, A 3%, ΔL 4%:Read the answer and worked solution →Dimensional formula of Stefan-Boltzmann constant σ (P = σAT⁴):Read the answer and worked solution →As per your syllabus, the unit of SOLID ANGLE in SI is which?Read the answer and worked solution →As per your syllabus, the dimensional formula of VELOCITY is which?Read the answer and worked solution →JEEMAIN · Physics · Spot the Error — MechanicsRead the answer and worked solution →CLASS10 · Physics · Magnetic Effect — Quick True/FalseRead the answer and worked solution →True or false: what Aristotle got wrongRead the answer and worked solution →Complete Newton's first lawRead the answer and worked solution →Which law is this?Read the answer and worked solution →MomentumRead the answer and worked solution →True or false: inertia and forceRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Tap every statement the first law licensesRead the answer and worked solution →Flip and pair: name with contributionRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Order the historical argumentRead the answer and worked solution →Tap every SI base quantityRead the answer and worked solution →Match each base quantity to its SI unitRead the answer and worked solution →Base unit or derived unit?Read the answer and worked solution →Complete the structure of a unit systemRead the answer and worked solution →True or false: the SI systemRead the answer and worked solution →Naming the unitsRead the answer and worked solution →True or false: measurement in physicsRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Flip and pair: quantity with unitRead the answer and worked solution →
Worked practice questions
In Young's modulus determination: Y = (FL)/(A ΔL). Maximum percentage error if F (force) 1%, L (length) 2%, A 3%, ΔL 4%:
- 2%
- 10% (= 1 + 2 + 3 + 4)
- 10%
- 6%
Show answer and solution
Correct answer: B. 10% (= 1 + 2 + 3 + 4)
Y has F¹L¹A⁻¹ΔL⁻¹.
ΔY/Y = 1 × 1% + 1 × 2% + 1 × 3% + 1 × 4% = 10%.
(Each exponent is 1 in absolute value.)
Dimensional formula of Stefan-Boltzmann constant σ (P = σAT⁴):
- MT⁻³K⁻⁴ (= power/(area × T⁴) = MT⁻³/K⁴)
- M
- Random
- ML
Show answer and solution
Correct answer: A. MT⁻³K⁻⁴ (= power/(area × T⁴) = MT⁻³/K⁴)
P/A = σ T⁴.
P/A has dim MT⁻³ (power per area = W/m² = J/(s m²)). T⁴ has K⁴.
We have So [σ] = MT⁻³/K⁴.
So So [σ] = MT⁻³K⁻⁴.
**SI value:** 5.67 × 10⁻⁸ W m⁻² K⁻⁴.
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