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পদার্থ বিজ্ঞান
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ME/IPE/MME
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Questions
0 read · 0 practiced · 0 answered in examsMomentum-এর dimensional formula কী?
Correct answer: a
Momentum = mass × velocity = [M][LT⁻¹] = [MLT⁻¹]।
Force-এর dimensional formula কোনটি?
Correct answer: b
F = ma; তাই dimension [M][LT⁻²] = [MLT⁻²]।
Work-এর dimensional formula কী?
Correct answer: b
Work = force × displacement = [MLT⁻²][L] = [ML²T⁻²]।
Power-এর dimensional formula কোনটি?
Correct answer: c
Power = work/time = [ML²T⁻²]/[T] = [ML²T⁻³]।
Pressure-এর dimensional formula কী?
Correct answer: b
Pressure = force/area = [MLT⁻²]/[L²] = [ML⁻¹T⁻²]।
Density-এর dimensional formula কোনটি?
Correct answer: a
Density = mass/volume = [M]/[L³] = [ML⁻³]।
Impulse-এর dimension কোনটি?
Correct answer: a
Impulse = force × time = [MLT⁻²][T] = [MLT⁻¹], যা momentum-এর dimension।
Surface tension-এর dimensional formula কী?
Correct answer: a
Surface tension = force/length = [MLT⁻²]/[L] = [MT⁻²]।
Gravitational constant G-এর dimension কোনটি?
Correct answer: a
F = Gm₁m₂/r² থেকে G = Fr²/m²; তাই [M⁻¹L³T⁻²]।
Planck constant h-এর dimension কী?
Correct answer: a
E = hν থেকে h = E/ν = [ML²T⁻²]·[T] = [ML²T⁻¹]।